浅埋近距离煤层工作面末采阶段等压原理与应用

杨尚; 宁建国; 商和福; 徐强; 邱鹏奇; 姜宁

浅埋近距离煤层工作面末采阶段等压原理与应用

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出版历程
- 发布日期: 2019-11-19

Isobaric Principle and Application of End-mining Stage in Shallow Buried Near-distance Coal Seam Working Face

摘要

摘要: 为研究浅埋近距离煤层工作面末采阶段等压原理,以高家梁煤矿20314工作面末采阶段为工程背景,首先利用关键层位置判别法确定2-2上煤层间距5 m处的细粒砂岩为亚关键层,间距32 m处的粗粒砂岩为主关键层;通过覆岩岩层离层量S_n判断了上覆岩层破断层位,然后,分析工作面末采阶段不采取停采等压和采取等压技术2种情况下工作面贯通后上覆岩运动规律,并通过理论计算确定工作面距回撤通道6.6 m处为最佳停采等压位置,并在20314工作面末采阶段进行现场试验,回撤工作安全顺利完成。
- 近距离煤层 /
- 回撤通道 /
- 上覆岩层 /
- 关键层 /
- 末采阶段
Abstract: In order to study the isobaric principle of the mining stage in the shallow buried near-distance coal seam, the mining stage of the 20314 working face in Gaojialiang Coal Mine is taken as the engineering background. Firstly, the key layer location discrimination method is used to determine that the fine-grained sandstone at the interval of 5 m on the upper coal seam of 2-2 is a sub-key layer, and the coarse-grained sandstone at the interval of 32 m is the main key layer. The fault location of overlying strata was determined by layer separation S_n. Then, the overlying rock movement laws of the working face after passing through without stop-mining isobaric pressure or adopting isobaric pressure technology are analyzed. Through theoretical calculation, the 6.6 m from the working face to the retracement channel is determined to be the best isobaric position of stoping, and the field test is carried out at the end stage of 20314 working face, and the retracement work is completed safely and smoothly.
- close coal seam /
- withdrawal channel /
- overlying rock /
- key layer /
- end mining phase

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参考文献(9)

[1]	王晓振,鞠金峰,许家林.神东浅埋综采面末采段让压开采原理及应用[J].采矿与安全工程学报,2012,29(2):151-155.
[2]	吕华文.预掘回撤通道稳定性机理分析及应用[J].煤炭学报,2014,39(S1):50-56.
[3]	杨娟.大采高综采工作面末采阶段来压规律与顶板控制技术[J].煤炭工程,2015,47(10):54-57.
[4]	黄庆享.浅埋煤层的矿压特征与浅埋煤层定义[J].岩石力学与工程学报,2002,21(8):1174-1177.
[5]	许家林,钱鸣高.覆岩关键层位置的判别方法[J].中国矿业大学学报,2000,29(5):463-467.
[6]	金志远.浅埋近距煤层重复扰动区覆岩导水裂隙发育规律及其控制[D].徐州:中国矿业大学,2015:75-80.
[7]	郑芳菲,孙中光,李少刚.综采工作面末采阶段等压原理与顶板控制技术[J].矿业安全与环保,2015,42(2):64-67.
[8]	秦忠诚,张望宝,王九利.浅埋煤层综采面超前支承压力影响范围与末采让压技术研究[J].煤炭工程,2016, 48(12):53-55.
[9]	黄荣宾.综采工作面末采阶段矿压显现规律研究[D].西安:西安科技大学,2015.