1) inferior key strata
亚关键层
1.
The effect of the inferior key strata breaking on weighting of longwall face;
相邻亚关键层破断对采场来压的影响分析
2) key strata
关键层
1.
Based on the technique of in-situ gob-side entry retaining with entry-in packing in fully-mechanized top-coal caving mining face(GEREPTF),the mechanical model of the surrounding rock for GEREPTF is established according to the key strata theories.
在综放巷内充填原位沿空留巷技术基础上,根据岩层控制的关键层理论,建立综放巷内充填原位沿空留巷围岩结构力学模型,推导出不同地质条件下巷内充填体的支护阻力计算公式,并对围岩与巷内充填体之间的相互作用机制进行深入分析。
2.
Aiming at the abnormal strata behavior in the advance entry of 1303 fully-mechanized working face in Xinglongzhuang coal mine,the movement rule,characteristic,step distance of fracturing,position and mode of fracturing of the overlying strata in mining process is analyzed by using the key strata theory.
针对兴隆庄煤矿一采区1303综放工作面超前平巷发生奇异压力的现象,采用关键层理论对在采动过程中的上覆岩层运动规律进行了详细的力学分析,研究了它们的运动特征、破断步距、断裂位置、断裂方式以及对工作面及其超前平巷的来压规律,对比分析了该工作面矿压实测数据与理论研究成果。
3.
The key strata control the process of the overlying strata movement and the dynamic expanding of the mining-induced fracture in coal mining stope,and then it will influence the gas dynamic emission of the adjacent layers in the mining-induced fractured rock mass.
煤矿覆岩中的关键层控制着上覆岩层的移动和采动裂隙的动态发展过程,进而也必将影响到邻近层瓦斯在采动破裂岩体内的动态涌出规律。
3) key stratum
关键层
1.
Resolving of thin base rock-gradient layer composite board and single key stratum;
薄基岩梯度复合板模型与单一关键层解算
2.
Stable characters of key stratum in stagger arrangement roadway layout top-coal caving mining;
错层位巷道布置放顶煤开采关键层的稳定特征
4) key layer
关键层
1.
Primary exploration of key layer postion effect in long-distanc stress-relieved exploitation;
远距离卸压开采关键层位置效应初探
2.
Base on the key layer theory and mining subsidence theory of the strata control,with the simulated material simulation test and the FLAC and UDEC numerical simulation calculation,the paper studied how to set the top boundary scope of the model for the strata displacement simulation.
基于岩层控制的关键层理论和开采沉陷理论,采用相似材料模拟试验、FLAC和UDEC数值模拟计算,对岩层移动模拟研究中如何确定模型上边界范围进行了研究。
3.
Under the guidance of key layer theory in strata control,the conditions of stiffness and strength for key layer are established by using elastic slab theory.
以岩层控制中的关键层理论为指导,应用弹性板理论建立了关键层的刚度条件和强度条件。
5) main key stratum
主关键层
1.
Because the coal caving height is larger in fully mechanized top coal caving mining,thick and hard rock strata at higher position turn into the main key stratum,which have large movement and higher impact energy.
综放工作面开采厚度大,高位厚硬岩层会成为主关键层,其运动幅度大、冲击能量高,发生矿震的可能性与危害性加大。
2.
The main key stratum that is made up of the hard stratum covering over the coal seam has a great influence on rock burst.
煤层上覆坚硬厚层岩层组成的主关键层对冲击矿压的发生具有强烈的影响。
6) thick key strata
厚关键层
1.
But the caving and rock pressure of very thick sand overlying strata,the thick key strata,is very complicated and needs further study.
具有良好分层性的采场覆岩破断规律已被基本掌握,但对于厚关键层(特厚层砂岩老顶)覆岩的采场矿压规律还需深入研究。
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