MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Waterrich weakly cemented powder limestone rock
Influence of Water Content on the Mechanical Behaviour of Limestone
2016年1月13日 The mechanical characteristics of various sedimentary stones significantly depend on the water content, where 70 % loss of their mechanical strengths can be observed 2023年6月7日 To better show the degradation process of rock slope water–rock interaction, we used bentonite as a watersensitive regulator to build a new rocklike material that matches the Experimental study on the reasonable proportions of rock 2022年12月15日 In particular, deep and large drilling wellbores traversing waterrich and weakly cemented strata in the western region subject the shaft lining to waterrock pressure, with Durability of reactive powder concrete of drilling shaft and 2024年4月10日 This study reveals the overburden failure characteristics and the initiation mechanism of water–sand inrush in weakly cemented strata, as well as the internal Overburden failure and water–sand mixture outburst conditions of weakly
Permeability evolution characteristics and microanalysis of
2022年5月9日 This study aimed to solve the problem of drilling shaft support under deep waterrich and weakly cemented stratum conditions Thus, ultrahighperformance reactive powder 2023年11月10日 After DP exceeds the critical value, some weakly cemented substances can escape from the sample, significantly changing the microscopic pore structure inside the Experimental investigation of the microstructural evolution of weakly 2024年1月16日 The results show that the nonhydrophilicity of rocklike materials can be adjusted to prevent them from softening and collapsing under the action of water Non Development of nonhydrophilic similar materials for weakly cemented 2018年10月23日 The results show that mudstone and shaly coarse sandstone are weakly cemented and have developed voids and loose structure These samples are rich in clay Experimental Study on the Permeability of Weakly Cemented Rock
Research on the ratio of similar materials in waterabsorbent
2024年2月21日 In the study of key support technologies for composite highstress tunnels in Pingmei No 6 Mine, a slurryrock coupling grouting test is planned for weakly cemented 2023年8月4日 Weakly cemented soft rock (WCSR) strata are widespread in Western China, and their creep characteristics with geostress change significantly affect coal mine safety production To study the longterm mechanical properties of WCSR, creep tests were performed under an initial confining pressure of 0–6 MPa The results indicated that with a greater initial confining Study on Creep Characteristics and Nonlinear Fractional2022年6月27日 of weakly cemented surrounding rock and anchorage system under the waterrich condition roof Therefore, this paper will analyze the reasons of roof falling accident of the No 1802 tailentry and reveal the catastrophe and anchorage mechanism of the surrounding rock of weakly cemented entry at the Danan Lake Mine in Hami, Xinjiang, China 2Study on the Evolution Laws of Anchoring Property of 2022年6月27日 The influences of parameters such as water content, pretightening force, and anchor length on the preload diffusion effect of weakly cemented surrounding rock anchorage structures are obtainedStudy on the Evolution Laws of Anchoring
Experimental study on secondary bearing mechanism of weakly cemented
2019年12月31日 In order to study the secondary bearing mechanism of weakly cemented broken surrounding rock, the surface of granite, limestone and mudstone broken rock samples were poured by cement slurry, and 1 Introduction Jurassic and Cretaceous weakly cemented strata are widespread in western China due to the special diagenetic environment [1, 2]The weakly cemented strata are dominated by sandstones, which are characterized by poor cementation, susceptibility to weathering, high porosity, and low strength []They are significantly different from normal sandstones and soft Experimental Study on Seepage Characteristics of Jurassic Weakly 2021年8月17日 E XPERIMENTAL STUDY ON SECONDARY BEARING MECHANISM OF WEAKLY CEMENTED BROKEN ROCK MASS P ING W ANG, T AO F ENG, Y ONGJIAN Z HU, W EIJIAN Y U ISSN P RINT 13928716, ISSN O NLINE 25388460, K AUNAS, L ITHUANIA 2229 of such surrounding rock must be controlled, to make sure that it can be selfstabilizing In Experimental study on secondary bearing mechanism of 2019年12月31日 In order to study the secondary bearing mechanism of weakly cemented broken surrounding rock, the surface of granite, limestone and mudstone broken rock samples were poured by cement slurry, and the weakly cemented rock mass was formed by static pressure infiltration method, and then an uniaxial loading test was carried out The results Experimental study on secondary bearing mechanism of weakly cemented
Evolution of WaterConducting Fracture in Weakly Cemented
2023年12月2日 The accurate prediction of the vertical extent of waterconducting fracture (WCF) zones in weakly cemented strata is particularly significant in preventing and controlling water hazards in western coal mines The evolution of fractures in weakly cemented strata affected by mining disturbances was comprehensively analyzed by physical similarity models, numerical 2023年11月10日 After filtration, the remaining cuttings powder was extracted and dried; finally, the dried rock debris powder was placed on a glass slide, paved, and placed in an instrument for XRD analysis Liu Q, Sun YJ, Li J (2020) Experimental study on seepage characteristics of jurassic weakly cemented sandstone under waterrock interaction Experimental investigation of the microstructural evolution of weakly 2022年6月27日 The attenuation of the anchorage force of the weakly cemented surrounding rock under different waterrich conditions was studied The key reason of No 1802 tailentry surrounding rock structure deterioration and roof fall was found The sample for composition analysis was ground to powder, while the SEM sample was made to a disk with a size Study on the Evolution Laws of Anchoring Property of Surrounding Rock 2022年5月9日 The drilling shaft lining is subjected to the action of surrounding rock pressure and highpressure water in the deep waterrich and weakly cemented stratum [22], [23] However, research on the multiaxial mechanical properties of RPC has mostly focused on the conventional triaxial, whereas research on stressseepage coupling has mostly focused Permeability evolution characteristics and microanalysis of
Experimental Study on Seepage Characteristics of Jurassic Weakly
2020年5月21日 As unconventional waterbearing rocks, the hydraulic conductivity of weakly cemented sandstones can increase by several orders of magnitude during drainages or pumping tests, posing great challenges to water prevention and control of coal mines in northwestern China In this study, seepage experiments on Jurassic weakly cemented sandstones were 2021年6月4日 The safety and efficiency of mining in western coal mining areas of China are threatened by water and sand bursting disasters In the current study, we determined the possibility of sand bursting via formula of the related norms in China for the weakly cemented Paleogene glutenite aquifer located at the 21–1 coal seam roof within Yili ecological area, Watersand mixture inrush through weakly cemented overburden 2024年2月26日 of weakly cemented surrounding rock and anchorage system under the waterrich condition roof Therefore, this paper will analyze the reasons of roof falling accident of the No 1802 tailentry and reveal the catastrophe and anchorage mechanism of the surrounding rock of weakly cemented entry at the Danan Lake Mine in Hami, Xinjiang, China 2Study on the Evolution Laws of Anchoring Property of 2017年1月1日 Characteristics of water sediment two phase flows in weakly cemented fractured rock mass based on Lattice Boltzmann method January 2017 DOI: 1013225/kijccs20165011Characteristics of water sediment two phase flows in weakly cemented
Experimental Study on the Permeability of Weakly Cemented Rock
2018年10月23日 Weakly consolidated rocks are usually rich in clay minerals, which have low strength and high water sensitivity When weakly consolidated rock encounters water, water molecules enter the 2020年5月21日 As unconventional waterbearing rocks, the hydraulic conductivity of weakly cemented sandstones can increase by several orders of magnitude during drainages or pumping tests, posing great Experimental Study on Seepage Characteristics of Jurassic Weakly 2021年5月1日 The roof of coal seams are mostly soft rock with weak cementation To further study the mechanical characteristics and deformation control scheme of the roadway with weakly cemented siltstone as Mechanical characteristics and deformation control of surrounding rock 2024年10月23日 Reef limestone has special pore structures, which makes its seepage characteristics remarkably different from those of conventional terrestrial tight rocks In this article, the microscopic structure of reef limestone and the water–cement ratio (WCR), cement fineness, and an admixture on flocculated cement particles were studied Meanwhile, the probability Experimental research into the injectability of cement grouts
Creep properties and energy evolution characteristics of weakly
2023年10月1日 The rheological failure of the weakly cemented surrounding rock appears due to various factors, such as the mechanical properties of the weakly cemented surrounding rock 8, 9, 10 and the stress environment 11, 12 However, the deformation and instability of the surrounding rock are essentially the comprehensive result of energy accumulation and dissipation2024年6月3日 A new stage control device for open TBM tunnel lining support in waterrich weakly cemented soft International Journal of Rock Mechanics and Mining Sciences ( IF 70) Pub Date : A new stage control device for open TBM tunnel lining 2023年11月3日 Reactive powder concrete (RPC) is ultrahighperformance concrete, which is a fiberreinforced cementbased composite material with superhigh impermeability and mechanical properties [12], [13] As the drilling shafts in the western mines of China are going to cross the deep waterrich and weakly cemented rock layer, investigating the Permeability evolution and pore characteristics of reactive powder 2021年12月27日 Weakly cemented sandstone is widely distributed in Northwest China Its mechanical properties decline after encountering water, resulting in engineering and technical problems such as excavation Engineering characteristics of waterbearing weakly cemented
Hydromechanical Properties and Engineering Applications of Weakly
2023年4月27日 The surrounding rock control of weakly cemented soft rock in the Jurassic strata roadway in the Northwest Mining Area has become one of the bottlenecks restricting mines’ safety and efficient production Based on the engineering background of the +170 m mining level West Wing main returnair roadway of Dananhu No 5 Coal Mine (DNCM) in Hami Xinjiang, through 2022年5月9日 The drilling shaft lining is subjected to the action of surrounding rock pressure and highpressure water in the deep waterrich and weakly cemented stratum [22], [23]However, research on the multiaxial mechanical properties of RPC has mostly focused on the conventional triaxial, whereas research on stressseepage coupling has mostly focused on the traditional Permeability evolution characteristics and microanalysis of 2024年1月16日 The mining of coal mines in western China needs to focus on protecting groundwater A nonhydrophilic similar material for simulating the development and hydraulic conductivity of weakly cemented Development of nonhydrophilic similar materials for weakly cemented 2024年10月30日 Limestone, sedimentary rock composed mainly of calcium carbonate, usually in the form of calcite or aragonite It may contain considerable amounts of magnesium carbonate (dolomite) as well; minor constituents also commonly present include clay, iron carbonate, feldspar, pyrite, and quartzLimestone Characteristics, Formation, Texture, Uses, Facts
Study of advanced dewatering and its influence on
2023年9月14日 waterrich stratum Zhao et al (2022) proposed a dewatering technology for tunnels in waterbearing weakly cemented sandstone stratum, which solved the collapse problem of tunnels in waterbearing weakly cemented sandstone stratum shortly after excavation Sedghi and Zhan (2021) gave the analytical solutionRequest PDF On Jan 1, 2023, Xin Kang and others published A New Stage Control Device for Open Tbm Tunnel Lining Support in WaterRich Weakly Cementing Soft Rock Find, read and cite all the A New Stage Control Device for Open Tbm Tunnel Lining Support in Water 2022年6月30日 of weakly cemented surrounding rock and anchorage system under the waterrich condition roof Therefore, this paper will analyze the reasons of roof falling accident of the No 1802 tailentry and reveal the catastrophe and anchorage mechanism of the surrounding rock of weakly cemented entry at the Danan Lake Mine in Hami, Xinjiang, China 2Study on the Evolution Laws of Anchoring Property of 2023年8月4日 Weakly cemented soft rock (WCSR) strata are widespread in Western China, and their creep characteristics with geostress change significantly affect coal mine safety production To study the longterm mechanical properties of WCSR, creep tests were performed under an initial confining pressure of 0–6 MPa The results indicated that with a greater initial confining Study on Creep Characteristics and Nonlinear Fractional
Study on the Evolution Laws of Anchoring Property of
2022年6月27日 of weakly cemented surrounding rock and anchorage system under the waterrich condition roof Therefore, this paper will analyze the reasons of roof falling accident of the No 1802 tailentry and reveal the catastrophe and anchorage mechanism of the surrounding rock of weakly cemented entry at the Danan Lake Mine in Hami, Xinjiang, China 22022年6月27日 The influences of parameters such as water content, pretightening force, and anchor length on the preload diffusion effect of weakly cemented surrounding rock anchorage structures are obtainedStudy on the Evolution Laws of Anchoring 2019年12月31日 In order to study the secondary bearing mechanism of weakly cemented broken surrounding rock, the surface of granite, limestone and mudstone broken rock samples were poured by cement slurry, and Experimental study on secondary bearing mechanism of weakly cemented 1 Introduction Jurassic and Cretaceous weakly cemented strata are widespread in western China due to the special diagenetic environment [1, 2]The weakly cemented strata are dominated by sandstones, which are characterized by poor cementation, susceptibility to weathering, high porosity, and low strength []They are significantly different from normal sandstones and soft Experimental Study on Seepage Characteristics of Jurassic Weakly
Experimental study on secondary bearing mechanism of
2021年8月17日 E XPERIMENTAL STUDY ON SECONDARY BEARING MECHANISM OF WEAKLY CEMENTED BROKEN ROCK MASS P ING W ANG, T AO F ENG, Y ONGJIAN Z HU, W EIJIAN Y U ISSN P RINT 13928716, ISSN O NLINE 25388460, K AUNAS, L ITHUANIA 2229 of such surrounding rock must be controlled, to make sure that it can be selfstabilizing In 2019年12月31日 In order to study the secondary bearing mechanism of weakly cemented broken surrounding rock, the surface of granite, limestone and mudstone broken rock samples were poured by cement slurry, and the weakly cemented rock mass was formed by static pressure infiltration method, and then an uniaxial loading test was carried out The results Experimental study on secondary bearing mechanism of weakly cemented 2023年12月2日 The accurate prediction of the vertical extent of waterconducting fracture (WCF) zones in weakly cemented strata is particularly significant in preventing and controlling water hazards in western coal mines The evolution of fractures in weakly cemented strata affected by mining disturbances was comprehensively analyzed by physical similarity models, numerical Evolution of WaterConducting Fracture in Weakly Cemented 2023年11月10日 After filtration, the remaining cuttings powder was extracted and dried; finally, the dried rock debris powder was placed on a glass slide, paved, and placed in an instrument for XRD analysis Liu Q, Sun YJ, Li J (2020) Experimental study on seepage characteristics of jurassic weakly cemented sandstone under waterrock interaction Experimental investigation of the microstructural evolution of weakly
Study on the Evolution Laws of Anchoring Property of Surrounding Rock
2022年6月27日 The attenuation of the anchorage force of the weakly cemented surrounding rock under different waterrich conditions was studied The key reason of No 1802 tailentry surrounding rock structure deterioration and roof fall was found The sample for composition analysis was ground to powder, while the SEM sample was made to a disk with a size