采矿与安全工程学报
採礦與安全工程學報
채광여안전공정학보
JOURNAL OF MINING AND SAFETY ENGINEERING
2014年
1期
60-65
,共6页
刘杰%王恩元%赵恩来%徐文全%胡少斌
劉傑%王恩元%趙恩來%徐文全%鬍少斌
류걸%왕은원%조은래%서문전%호소빈
采动应力监测%应力分布规律%动力现象
採動應力鑑測%應力分佈規律%動力現象
채동응력감측%응력분포규률%동력현상
mining-induced stress monitoring%stress distribution%dynamic phenomenon
为防止深部较软煤层发生动力灾害,以平煤股份二矿为工程背景,采用应力实时监测系统测试了深部工作面采动应力场,研究了工作面走向和倾向应力分布及变化规律,分析了应力对煤体稳定性及动力现象的影响,并探讨了工作面可能发生的动力灾害。结果表明,工作面上部(靠近采空区)超前采动影响距离、煤帮内应力集中范围、应力集中系数及应力峰值较大,工作面两端应力规律差异较大。应力峰值和应力梯度变化显著影响煤体的稳定性;通过监测工作面应力变化,可对工作面动力现象进行预测预报;工作面可能发生的动力灾害是应力起主导作用的压出灾害。
為防止深部較軟煤層髮生動力災害,以平煤股份二礦為工程揹景,採用應力實時鑑測繫統測試瞭深部工作麵採動應力場,研究瞭工作麵走嚮和傾嚮應力分佈及變化規律,分析瞭應力對煤體穩定性及動力現象的影響,併探討瞭工作麵可能髮生的動力災害。結果錶明,工作麵上部(靠近採空區)超前採動影響距離、煤幫內應力集中範圍、應力集中繫數及應力峰值較大,工作麵兩耑應力規律差異較大。應力峰值和應力梯度變化顯著影響煤體的穩定性;通過鑑測工作麵應力變化,可對工作麵動力現象進行預測預報;工作麵可能髮生的動力災害是應力起主導作用的壓齣災害。
위방지심부교연매층발생동력재해,이평매고빈이광위공정배경,채용응력실시감측계통측시료심부공작면채동응력장,연구료공작면주향화경향응력분포급변화규률,분석료응력대매체은정성급동력현상적영향,병탐토료공작면가능발생적동력재해。결과표명,공작면상부(고근채공구)초전채동영향거리、매방내응력집중범위、응력집중계수급응력봉치교대,공작면량단응력규률차이교대。응력봉치화응력제도변화현저영향매체적은정성;통과감측공작면응력변화,가대공작면동력현상진행예측예보;공작면가능발생적동력재해시응력기주도작용적압출재해。
To prevent the occurrence of dynamic disaster in deep soft coal seam, based on the engi-neering background in No.2 Coal Mine of Pingdingshan Tianan Coal Co. Ltd., the mining-induced stress field in the deep workface was measured by using the stress real-time monitoring system, and the distribution and variation of stress along strike and inclination was studied. In addition, the effect of stress on coal stability and dynamic phenomena was further analyzed, and the dynamic disasters which may occur in this workface were discussed. The results show that in the upper part of workface, which is approaching the gob-side, the influencing distance of advanced mining-induced stress, the stress con-centration range within the roadway coal sidewalls are larger, and the stress concentration factor and peak value of stress are higher. The stress distribution and variation is quite different between the head and end of the workface. Moreover, the variation of peak stress and stress gradient significantly influ-ence the stability of coalmass. Because the main disaster probably occurred at the workface is extrusion disaster controlled by the stress, the dynamic disasters can be fore casted by monitoring the stress changes at the workface.