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率先明确探测并提出底板采动导水破坏深度滞后煤壁二次加深的观点,并先后选择晋城、榆林、鄂尔多斯多个煤矿工作面做了验证,利用现场测试条件,在煤壁推过测点后,仍对底板采动破坏规律实施注水试验与底板岩层应变连续性探测。探测结果表明:1)底板岩层首次破坏发生在工作面刚推过测点的应力集中区;2)工作面推过测点15~20 m,即过测点后的第1次周期来压时,测点位置的底板导水破坏深度出现二次滞后加深,破坏加深程度一般在1~2 m;3)工作面推过测点2~4个周期来压后测点位置底板岩层变形状态趋于稳定;4)工作面推过测点后第1次周期来压到第4次周期来压之间(工作面推过测点15~60 m)这段距离为底板滞后突水高风险区域;5)底板注水试验与岩层应变探测试验的探测结果一致性很高。
Take the lead in a clear exploration and put forward the view that the depth of coal mining in the bottom of the mining floor is deepened and the coal wall deepens for the second time. It has also verified the coalfaces of a number of coal mines in Jincheng, Yulin and Erdos. By using the field test conditions, After the excavation of the floor is still the law of failure to implement water injection test and continuity of floor rock strata detection. The results show that: 1) the first failure of the bottom rock strata occurs in the stress concentration zone where the work face has just pushed the measuring point; 2) the work face has pushed through the measuring point 15-20 m, that is, the first cycle after the measuring point has been pressed , The depth of the aqueduct at the measuring point is deepened by the second lag, and the deepening degree of damage is generally 1-2 m. 3) The deformation of the floor rock strata at the measuring point 4) After the working face passes the measuring point, the first cycle is pressed to the fourth cycle to press (the working face is pushed through the measuring point 15-60 m) ; 5) floor water injection test and rock formation strain detection test results of the detection of high consistency.