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基于厚煤层一次采全高导水断裂带高度的确定.综合现有研究成果及相似模拟实验发现:工作面的开采范围影响上覆关键层的稳定性,而关键层的运动决定导水断裂带的高度,在关键层达到极限悬露步距之前,垮落带或者裂隙带的高度固定不变;当达到极限悬露步距后发生断裂,如果形成铰接结构,则关键层及其随动层属于裂隙带;反之,关键层及其随动层属于垮落带.在此基础上,提出以关键层理论划分采场导水断裂带的新方法,并给出适用条件.以补连塔31401工作面、潞安6202工作面以及柴沟1502工作面实际地质及回采条件为工程背景进行验证,发现一次采出煤层越厚,地质资料数据的精确性越高,新方法得到的数据越接近实测值,并且比《规程》计算结果更客观.
Based on the determination of the height of one full-height water-conducting fracture zone once in the thick coal seam, the existing research results and similar simulation experiments show that the mining area of the working face affects the stability of the overlying key layer, while the movement of the key layer determines the water- Height, before the critical layer reaches the limit hanging step, the height of the caving zone or fracture zone is constant; when the limit caving step is reached, the fracture occurs. If the hinge structure is formed, the key layer and its following layer belong to On the other hand, a new method of dividing the stope with water-bearing fault zone by key-layer theory is proposed and the applicable conditions are given. Surface, Lu’an 6202 working face and the actual geology and mining conditions of Chaigou 1502 working face are verified for the engineering background. The thicker the coal seam is once produced, the higher the accuracy of geological data is. The closer the data obtained by the new method to the measured value , And more objective than the “rules” calculation results.