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一、概述 为了验证ZY—3型自移支架对“大煤”顶板的适应性,为今后支架选型和制造新型支架提供依据,对鹤壁四矿2103_1综采工作面顶板压力进行了观测。在综采工作面观测的同时,对煤层底板该工作面正下方的-250水平运输石门进行了变形稳定性观测,探索石门巷道变形与顶部回采工作面顶板压力之间的关系。 2103_1工作面位于井田南翼,西邻2101已采区,东为煤田深部未采区。工作面长130米,走向长785米。煤层厚度8.5米,分层开采,第一分层采厚2.2米。煤层倾角6.5～13°,仰斜长壁分层金属网假顶全部垮落法采煤。 工作面内有三条落差0.4～0.9米的断层,对生产无大影响。煤层伪顶为0.1～0.3米厚炭质粉砂岩,直接顶为3.5米厚砂质泥岩,老顶为8米厚砂岩。本地区受褶曲影响,煤层顶板破碎,煤尘较大,发火期4～6个月。
I. Overview In order to verify the adaptability of the ZY-3 self-moving bracket to the “big coal” roof and provide the basis for the future selection and manufacture of the new bracket, the roof pressure of 2103_1 fully mechanized coal face in Hebi No.4 Mine was observed. While observing the fully mechanized coal mining face, the deformation stability of the Shihmen at -250 level just below the working face of the coal seam floor was observed to explore the relationship between the deformation of Shihmen alleyway and the roof pressure of the top coal mining face. 2103_1 The working face is located in the south wing of Ida, with the 2101 mining area to the west and the deep undeveloped area to the east. Face 130 meters long, 785 meters long. Seam thickness of 8.5 meters, stratified mining, the first stratified mining thickness of 2.2 meters. Seam angle 6.5 ~ 13 °, tilted longwall layered metal mesh roof all caving method coal mining. There are three faults in the working face with 0.4-0.9 m drop, which have no big effect on the production. Pseudo-top coal seam 0.1 to 0.3 meters thick carbonaceous siltstone, directly to the top 3.5 meters thick sandy mudstone, the old roof is 8 meters thick sandstone. Affected by the fold in this area, the roof of coal seam is broken and coal dust is larger, with a firing period of 4 to 6 months.