Strata Behaviors Laws Under the Condition of Thick Sandstone Roof Weakening

LI Chunjia; SHEN Mengfei

doi:10.3981/j.issn.1000-7857.2014.15.007

PDF(1389 KB)

Science & Technology Review ›› 2014, Vol. 32 ›› Issue (15) : 53-57. DOI: 10.3981/j.issn.1000-7857.2014.15.007

Articles

Strata Behaviors Laws Under the Condition of Thick Sandstone Roof Weakening

Author information -

1. Xinji No.2 Coal Mine, SDIC Xinji Energy AG, Huainan 232172, China;
2. School of Energy and Safety Engineering, Anhui University of Science and Technology, Huainan 232001, China;
3. Provincial and MOE Joint Key Laboratory of Mine Safety and High Efficient Mining, Anhui University of Science and Technology, Huainan 232001, China

Abstract

With the fully mechanized coal mine surface of a mine 210108 as the object of research, in view of the fact that the working face is hard and the natural caving roof is not easy to colapse, in order to determine its characteristics under the condition of the mine, an observation scheme is devised for the thick sand roof under the condition of the deep hole blasting weakening the mineral pressure. Based on the measured data and the daily field pressure analysis, the pressure characteristics, the stope roof activity and the abutment pressure distribution are studied, and analyzed during the first weighting and periodic changes of the support load. It is shown that under the condition of hard roof weakening, an understanding of the mine pressure variation law is of great significance to safety and efficiency of the working face mining.

Key words

thick sandstone roof / blasting and weakening / load of hydraulic support / strata behaviors

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

LI Chunjia, SHEN Mengfei. Strata Behaviors Laws Under the Condition of Thick Sandstone Roof Weakening[J]. Science & Technology Review, 2014, 32(15): 53-57 https://doi.org/10.3981/j.issn.1000-7857.2014.15.007

References

[1] 王开, 康天合, 李海涛, 等. 坚硬顶板控制放顶方式及合理悬顶长度的研究[J]. 岩石力学与工程学报, 2009, 11(28): 2320-2327. Wang Kai, Kang Tianhe, Li Haitao, et al. Study of control caving methods and reasonable having roof length on hard roof[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 11(28): 2320-2327.
[2] 周登辉, 伍永平, 解盘石. 大倾角坚硬顶板深孔超前预爆破研究与应用[J]. 西安科技大学学报, 2009, 29(5): 510-514. Zhou Denghui, Wu Yongping, Xie Panshi. Big dip angle and hard roof of advanced research and application of deep hole blasting[J]. Journal of Xi'an University of Science and Technology, 2009, 29(5): 510-514.
[3] 靳钟铭, 徐林生. 煤矿坚硬顶板控制[M]. 北京: 煤炭工业出版社, 1994: 203-235. Jin Zhongming, Xu Linsheng. Hard roof control in coal mine[M]. Beijing: China Coal Industry Publishing House, 1994: 203-235.
[4] 黄洋, 姚强岭, 丁效雷, 等. 坚硬顶板条件下老顶来压预测预报[J]. 煤炭工程, 2008, 12: 56-57. Huang Yang, Yao Qiangling, Ding Xiaolei, et al. Under the condition of hard roof main roof weighting forecasting[J]. Coal Engineering, 2008, 12: 56-57.
[5] 曹胜根, 姜海军, 王福海, 等. 采场上覆坚硬岩层破断的数值模拟研究[J]. 采矿与安全工程学报, 2013, 30(2): 205-210. Cao Shenggen, Jiang Haijun, Wang Fuhai, et al. Numerical simulation of overlying hard strata rupture in a coal face[J]. Journal of Mining & Safety Engineering, 2013, 30(2): 205-210.
[6] 牛锡倬. 煤矿坚硬难冒顶板控制[J]. 岩石力学与工程学报, 1988, 7(2): 137-146. Niu Xizhuo. Hard coal mine roof control[J]. Chinese Journal of Rock Mechanics and Engineering, 1988, 7(2): 137-146.
[7] 沈明荣, 陈建峰. 岩体力学[M]. 上海: 同济大学出版社, 2006: 105-119. Shen Mingrong, Chen Jianfeng. Rock mass mechanics [M]. Shanghai: Tongji University Press, 2006: 105-119.
[8] 王毅, 丁可可, 孙增飞, 等. 坚硬顶板条件下老顶初次来压规律研究[J]. 能源技术与管理, 2010(3): 67-69. Wang Yi, DingKeke, Sun Zengfei, et al. Under the condition of hard roof and old first to pressure law research[J]. Energy Technology and Management, 2010(3): 67-69.
[9] 黄靖龙. 液压支架初撑力不足的原因及对策[J]. 矿山压力与顶板管理, 2002(2): 24-26. Huang Jinglong. The causes and countermeasures of hydraulic support setting force is insufficient[J] Mine Pressure and Roof Management, 2002 (2): 24-26.