CAJ | 학술논문

研究基于突出煤层连续卸压的近距下保护层合理开采展开。为确定被保护层开采的可行性与卸压效果，首先进行相似模拟试验并提出基于关键层理论的采场“三带”划分方法，结合实践数据确定被保护层在“三带”中的层位及相应的卸压效果，并对层间关键层以及保护层开采范围的影响进行分析。结合某矿开采煤2作为煤1保护层的工程实际，认为层间关键层在原设计工作面长度情况下会影响煤1沿倾向的卸压效果，提出在煤2中布置完全无煤柱搭接工作面，相应的裂隙带高度上升，相对降低煤1在裂隙带中的层位，卸压效果更充分，并且可以实现煤1沿倾向的连续以及反复卸压。最后，综合回采率和巷道工程量考虑，煤2采用无煤柱开采方案比原方案增加回采利润2.84亿元人民币；与5 m小煤柱沿空掘巷相比，减少岩巷工程费用计600万元人民币，增加回采利润1.4亿元人民币。因此，研究的结论具有一定技术与经济意义。
연구기우돌출매층련속사압적근거하보호층합리개채전개。위학정피보호층개채적가행성여사압효과，수선진행상사모의시험병제출기우관건층이론적채장“삼대”화분방법，결합실천수거학정피보호층재“삼대”중적층위급상응적사압효과，병대층간관건층이급보호층개채범위적영향진행분석。결합모광개채매2작위매1보호층적공정실제，인위층간관건층재원설계공작면장도정황하회영향매1연경향적사압효과，제출재매2중포치완전무매주탑접공작면，상응적렬극대고도상승，상대강저매1재렬극대중적층위，사압효과경충분，병차가이실현매1연경향적련속이급반복사압。최후，종합회채솔화항도공정량고필，매2채용무매주개채방안비원방안증가회채리윤2.84억원인민폐；여5 m소매주연공굴항상비，감소암항공정비용계600만원인민폐，증가회채리윤1.4억원인민폐。인차，연구적결론구유일정기술여경제의의。
The research was basis of reasonable mining on the nether protective seam in inclined contiguous seams with continuous pressure-relief on outburst coal seam. In order to confirm the feasibility of mining protected seam and its pressure-relief effect,the similar simulation experiments initially were carried out and a division approach of“three zones”(caving zone,fractured zone and sagging zone) in stope was proposed based on the theory of key strata. Then,combined with field data,the position of protected seam in“three zones”and its pressure-relief effect can be determined;the effect of key strata between contiguous seams and the range of mining protective seam were eventually analyzed. Engineering practice,which coal seam #2 was mined as protective seam of coal seam #1,was taken as an example. Key strata between contiguous seams would affect pressure-relief effect in inclined direction in the case of original designed length of mining face;mining faces without overlap joint were assigned in coal seam #2,which made fractured zone increased,and also the level of coal seam #1 decreased in the fractured zone relatively,made pressure-relief effect more sufficient,and fulfilled pressure-relief in the direction of dip continuously and repeatedly. Finally,recovery ratio and engineering work of tunneling were considered,and compared with the original scheme of mining coal seam #2,he scheme with no pillars increases profit 0.284 billion RMB;and compared with gob-side entry driving with 5m small coal pillars,the scheme with no pillars decreases the cost of rock roadway 6 million RMB,and increases profit 0.14 billion RMB. Therefore,the research conclusions have certain technical and economic significance.