神东矿区综采面采高对来压步距的影响分析

发布时间：2018-12-08 15:10

【摘要】：采用统计原理确定神东矿区采高与工作面初次来压步距及周期来压步距数据的分布状态,并运用岩石力学、矿压理论就采高增加与工作面来压步距的关系进行了深入研究。结果表明:采高与平均初次来压步距呈指数函数关系,与平均周期来压步距呈二项式函数关系。总体来说,采高增加,平均初次来压步距呈同步增加趋势。采高增加,引起普通采高条件下的基本顶岩层转化为直接顶岩层。采场基本顶岩性和裂隙发育程度与工作面来压步距紧密相关,会引起来压步距的增减。神东矿区2,5,6,7号煤组采场工作面来压步距较1,3,4号煤组相对较长。冒落矸石对采空区充填程度高,初次来压步距增大,但对周期来压步距影响有限。将工作面采高增加对来压步距的影响规律应用到神东矿区末采贯通实践中,指导了补连塔矿22306工作面末采贯通。
[Abstract]:The distribution state of the data of mining height, first pressure step and periodic pressure step of working face in Shendong mining area is determined by using statistical principle. The relationship between mining height increase and working face pressure step distance is deeply studied by using rock mechanics and rock pressure theory. The results show that the relationship between the mining height and the average initial pressure step is exponential function, and the relationship between the average period pressure step distance and the average period pressure step distance is a binomial function. On the whole, the mining height increased and the average initial pressure step increased synchronously. The increase of mining height results in the conversion of the basic top strata into direct top strata under the condition of common mining height. The basic roof lithology and fracture development degree of stope are closely related to the working face pressure step distance, which will lead to the increase or decrease of the pressure step distance. In Shendong coal mining area, the pressure step distance from the stope of No. 7 and No. 2 coal groups is longer than that of No. 4 coal group, and the pressure step distance of the stope face is longer than that of No. 4 coal group. The caving gangue has a high degree of filling in the goaf and increases the initial pressure step, but has a limited effect on the periodic pressure step. This paper applies the law of the influence of the increase of mining height on the step distance of pressure to the practice of final mining in Shendong mining area, which guides the final mining of 22306 working face in Bulianta Coal Mine.
【作者单位】：贵州理工学院矿业工程学院;河南理工大学能源科学与工程学院;河南工程学院安全工程学院;
【基金】：国家自然科学基金煤炭联合基金重点项目(U1261207);国家自然科学基金项目(51564004)
【分类号】：TD323

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