开采参数对远程上行卸压开采应力-裂隙的影响
Influence of Mining Parameters on Stress and Fissure in Long Distance Upward Pressure Relief Mining
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摘要: 基于潘二煤矿A3煤和B4煤开采地质条件，建立了A3煤远程上行卸压开采数值模拟试验模型，研究了开采参数对远程上行卸压开采应力-裂隙演化特征影响。通过改变模型开采参数，获得了采厚与面长对远程上行卸压开采应力场、位移场分布的影响规律。研究结果表明，下部卸压煤层的开采厚度是影响上覆岩层移动破坏及裂隙发育高度的根本因素。随着采厚的增大，垮落带与断裂带的发育高度也随之增大，卸压范围随之增大；开采面长对于上行卸压开采卸压范围的影响较大，面长在一定程度上决定着煤层采动是否为充分采动，在充分采动条件下上行卸压层卸压范围要大于非充分采动条件下的卸压范围。Abstract: Based on the mining geological conditions of A3 coal and B4 coal in Pan’er Coal Mine, a numerical simulation model of long-distance upward pressure relief mining of A3 coal was established. By changing the mining parameters of the model, the influence law of mining thickness and face length on stress field and displacement field distribution in long-distance upward pressure relief mining is obtained. The results show that the mining thickness of the lower relief seam is the fundamental factor affecting the movement and failure of the overlying strata and the height of fracture development. With the increase of mining thickness, the development height of caving zone and fracture zone increases, and the pressure relief range enlarges accordingly; the mining face length has a great influence on the pressure relief range of upward pressure relief mining, and to a certain extent, the face length determines whether the coal seam is fully mined or not, and the pressure relief range of the pressure relief bed under the condition of full mining is larger than that under insufficient mining condition.
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[1] 袁亮.低透高瓦斯煤层群安全开采关键技术研究[J].岩石力学与工程学报,2008(7):1370-1379. [2] 何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005(16):2803-2813. [3] 周宏伟,谢和平,左建平.深部高地应力下岩石力学行为研究进展[J].力学进展,2005(1):91-99. [4] 谢广祥,王磊.综放工作面煤层及围岩破坏特征的采厚效应[J].煤炭学报,2010,35(2):177-181. [5] 谢广祥.综放工作面及其围岩宏观应力壳力学特征研究[J].煤炭学报,2005,30(3):309-313. [6] 谢广祥.采厚对工作面及围岩应力壳的力学特征影响研究[J].煤炭学报,2006,31(1):6-10. [7] 谢广祥,杨科,常聚才.非对称综放开采煤层三维应力分布特征及其层厚效应研究[J].岩石力学与工程学报,2007,26(4):775-779. [8] 杨科,谢广祥,常聚才.不同采厚围岩力学特征的相似模拟实验研究[J].煤炭学报,2009,34(11):1446. [9] 杨科,谢广祥.采动裂隙分布及其演化特征的采厚效应[J].煤炭学报,2008,33(10):1092-1096. [10] 唐军华,白海波,杜锋.采场支承压力分区变异特征研究[J].采矿与安全工程学报,2011,28(2):293. [11] 郭文兵,刘义新.深部条带开采下沉系数与采厚关系的数值模拟[J].河南理工大学学报(自然科学版),2007,26(3):254-258. [12] 赵兵朝,刘樟荣,同超,等.覆岩导水裂缝带高度与开采参数的关系研究[J].采矿与安全工程学报,2015, 32(4):634-638. [13] 袁亮,郭华,沈宝堂,等.低透气性煤层群煤与瓦斯共采中的高位环形裂隙体[J].煤炭学报,2011(3):357-365.
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