充填采煤彈性基礎(chǔ)邊界基本頂薄板破斷規(guī)律
[Abstract]:Based on the difference theory and the breaking criterion of the main bending moment, the elastic foundation coefficient (kf,) of the filling body is studied by using the boundary elastic foundation thin plate mechanics model of filling mining. The effects of elastic modulus E and boundary elastic foundation coefficient K / M on the principal bending moment and breaking law of the basic roof are obtained. The following conclusions are obtained: (1) when KF increases, the maximum absolute maximum principal moment Mb of short edge and long edge leading coal wall and filling area is obtained. The Md / M / O decreases, the M / O decreases the most, and the M\ +\ {# * $\}\ {\}\ (2) when the number of E or h is reduced, the number of M / W / M / D / M / s / b / s / s (4) there is differentiation effect in the basic top bending moment of filling area: the larger the kf or the smaller the HEU E, the bigger the maximum principal moment in the filling area is gradually transferred to the periphery, and the greater the main moment in the non-midpoint area is, the smaller the effect is on the differentiation effect. When the main bending moment of the top is greater than the ultimate moment under filling condition, the initial breaking position is the long edge deep into the coal wall surface or the middle bottom surface. When the kf is small, the enrichment rate is low and the overburden is large, the basic top fracture types are as follows: (1) the short edge surface of the long edge surface, (2) the short edge surface of the long edge surface, (2) the middle edge surface of the long edge surface, the short edge surface of the long edge surface; (3) the middle bottom surface has long edge surface and short edge surface.
【作者單位】: 中國礦業(yè)大學(xué)(北京)資源與安全工程學(xué)院;中國礦業(yè)大學(xué)(北京)共伴生能源精準(zhǔn)開采北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(51234005,51504259) 中央高;究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(2010QZ06)
【分類號】:TD32;TD823.7
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