本文選題：開(kāi)采沉陷 + 非連續(xù)變形　； 參考：《金屬礦山》2017年11期

【摘要】：地下開(kāi)采易造成地表產(chǎn)生裂縫、塌陷坑等非連續(xù)變形。針對(duì)開(kāi)采沉陷地表預(yù)計(jì)點(diǎn)生成的三角網(wǎng)無(wú)法自動(dòng)提取地表非連續(xù)破壞邊界的問(wèn)題,將開(kāi)采沉陷預(yù)計(jì)與有限單元法相結(jié)合來(lái)判斷地表斷裂三角形,提出了一種基于斷裂三角網(wǎng)的礦區(qū)地表非連續(xù)變形邊界提取算法。該算法利用斷裂三角網(wǎng)邊與點(diǎn)的拓?fù)鋵傩砸约皵嗔讶蔷W(wǎng)邊界僅有一個(gè)鄰接三角形的特性,以多邊形凸點(diǎn)為起始點(diǎn),按最大右角準(zhǔn)則搜索邊界點(diǎn),順時(shí)針提取多邊形的內(nèi)、外邊界線,若當(dāng)前邊界點(diǎn)與初始點(diǎn)重合且前一個(gè)邊界點(diǎn)與非極值點(diǎn)重合,則提取出一個(gè)邊界,經(jīng)過(guò)多次循環(huán)從而可提取出采區(qū)上方的地表非連續(xù)變形邊界。研究表明:所提算法可有效提取出具有公共點(diǎn)的特殊邊界與相離邊界,實(shí)現(xiàn)斷裂三角網(wǎng)邊界一體化提取,有助于提高礦區(qū)地表非連續(xù)變形區(qū)域開(kāi)采沉陷監(jiān)測(cè)預(yù)計(jì)精度。
[Abstract]:Underground mining will easily lead to surface cracks, collapse pits and other discontinuous deformation. Aiming at the problem that the triangle network generated by the predicted points of mining subsidence can not automatically extract the surface discontinuous failure boundary, the mining subsidence prediction is combined with the finite element method to judge the surface fracture triangle. An algorithm for extracting discontinuous deformation boundary of mining area surface based on fault triangulation is proposed. The algorithm uses the topological properties of the edge and point of the faulted triangular network and the characteristic that the boundary of the fractured triangular network has only one adjacent triangle, taking the convex point of the polygon as the starting point, searching the boundary point according to the criterion of maximum right angle, and extracting the polygon clockwise. If the current boundary point coincides with the initial point and the former boundary point and the non-extreme point coincide, a boundary is extracted, and the surface discontinuous deformation boundary over the mining area can be extracted after several cycles. The research shows that the proposed algorithm can effectively extract the special boundary and the separated boundary with common points, and realize the integrated extraction of the boundary of fault triangle network, which is helpful to improve the prediction precision of mining subsidence monitoring in the discontinuous deformation area of mining area.
【作者單位】： 江蘇師范大學(xué)地理測(cè)繪與城鄉(xiāng)規(guī)劃學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(編號(hào):41671395,51574132)
【分類號(hào)】：TD325.2

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