山西煤炭
山西煤炭
산서매탄
Shanxi Coal
2015年
5期
33-36,40
,共5页
离柳矿区%太灰岩%关键层%来压步距%压架
離柳礦區%太灰巖%關鍵層%來壓步距%壓架
리류광구%태회암%관건층%래압보거%압가
Liliu mining area%Taiyuan group limestone%key stratum%weighting interval%support crashing
以离柳矿区太原组灰岩顶板为工程背景,通过对矿区内太原组灰岩赋存条件、岩石物理力学性能的研究,建立两个矿区灰岩顶板结构模型,利用关键层理论,判断开采过程中灰岩顶板的运动规律.比较矿区回采工作面矿压显现规律与计算结果,归纳出顶板正常来压和异常来压规律. 研究表明,L1灰岩作为直接顶垮落,初次来压步距28.6~35.8 m,周期来压步距8.3~11.4 m,周来压期间矿压显现不剧烈;灰岩组岩层同时断裂时工作面矿压显现剧烈,容易压死支架,确保L1灰岩及时冒落和防止L4灰岩断裂位置前移是控制顶板稳定的关键.
以離柳礦區太原組灰巖頂闆為工程揹景,通過對礦區內太原組灰巖賦存條件、巖石物理力學性能的研究,建立兩箇礦區灰巖頂闆結構模型,利用關鍵層理論,判斷開採過程中灰巖頂闆的運動規律.比較礦區迴採工作麵礦壓顯現規律與計算結果,歸納齣頂闆正常來壓和異常來壓規律. 研究錶明,L1灰巖作為直接頂垮落,初次來壓步距28.6~35.8 m,週期來壓步距8.3~11.4 m,週來壓期間礦壓顯現不劇烈;灰巖組巖層同時斷裂時工作麵礦壓顯現劇烈,容易壓死支架,確保L1灰巖及時冒落和防止L4灰巖斷裂位置前移是控製頂闆穩定的關鍵.
이리류광구태원조회암정판위공정배경,통과대광구내태원조회암부존조건、암석물리역학성능적연구,건립량개광구회암정판결구모형,이용관건층이론,판단개채과정중회암정판적운동규률.비교광구회채공작면광압현현규률여계산결과,귀납출정판정상래압화이상래압규률. 연구표명,L1회암작위직접정과락,초차래압보거28.6~35.8 m,주기래압보거8.3~11.4 m,주래압기간광압현현불극렬;회암조암층동시단렬시공작면광압현현극렬,용역압사지가,학보L1회암급시모락화방지L4회암단렬위치전이시공제정판은정적관건.
Taking Taiyuan group limestone roof as an engineering background in Liliu mine, on the analysis of occurrence, rock physical and mechanical performance of the Taiyuan group limestone, the structure models of limestone roof in two mines were established. The theory of key stratum was used to determine the movement rule of limestone roof in the mining. Mine pressure behavior and calculation were compared to sum up the normal and abnormal weighting. The results show that, as direct roof collapses, the first weighting interval of L1 limestone is 28.6~35.8 meters, periodical weighting interval is 8.3~11.4 meters. the strata behavior is not obvious in the process of the periodical weighting. The strata behavior is severe when the limestone strata break at the same time and the support is liable to crash. Therefore, it is essential to ensure the prompt collapse of the L1 limestone and to prevent the breaking position of L4 limestone from moving forward.
