综采工作面预留回风巷超前压力分析
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摘要
针对黄陵煤业二号煤矿预留上一个采煤工作面辅运巷作为下一个采煤工作面回风巷的回采巷道布置方法,通过监测207回采工作面回风巷锚杆应力及顶底板位移变化数据,分析回采期间回风巷整体压力分布、超前压力影响范围内顶板压力的变化规律,以及回风巷通过水仓时的高度变化、抽放钻孔施工排水对巷道压力显现的影响,掌握了超前支承压力分布规律,外部因素对压力显现的影响,为预判回采过程中回风巷来压提供了依据。
In view of the layout method in Huangling No. 2 coal mine,which reserved the auxiliary haulage roadway of the upper coal mining face as the air return roadway of the next coal mining face,by monitoring the bolt stress and roof and floor displacement in the air return roadway of No. 207 coal mining face,the change law of roof pressure during mining period was analyzed,the height change of air return roadway when it passes through the water sump and the influence of drainage borehole construction on the strata behaviors were summarized,and the distribution law of advanced support pressure and the influence of external factors on the pressure behaviors were grasped,which provides a basis for predicting the pressure of air return roadway in mining process.
In view of the layout method in Huangling No. 2 coal mine,which reserved the auxiliary haulage roadway of the upper coal mining face as the air return roadway of the next coal mining face,by monitoring the bolt stress and roof and floor displacement in the air return roadway of No. 207 coal mining face,the change law of roof pressure during mining period was analyzed,the height change of air return roadway when it passes through the water sump and the influence of drainage borehole construction on the strata behaviors were summarized,and the distribution law of advanced support pressure and the influence of external factors on the pressure behaviors were grasped,which provides a basis for predicting the pressure of air return roadway in mining process.
引文
[1]胥海东,海煜,李立波,等.大采高回采巷道保护煤柱局部变形特征监测分析[J].陕西煤炭,2011,30(1):28-30.
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[3]马龙涛.巷道变形机理分析与支护参数优化研究[J].煤炭科学技术,2016,44(S1):55-57.
[4]马龙涛.回采巷道煤柱侧向压力分布规律实测分析[J].陕西煤炭,2017,36(6):58-60.
[2]刘学政.应力监测系统监测采面超前支撑压力实践[J].山东煤炭科技,2006,34(S1):146-147.
[3]马龙涛.巷道变形机理分析与支护参数优化研究[J].煤炭科学技术,2016,44(S1):55-57.
[4]马龙涛.回采巷道煤柱侧向压力分布规律实测分析[J].陕西煤炭,2017,36(6):58-60.