The water-inrush mechanism of strong water-guide collapse column in coal seam is studied based on the establishment of geological and mathematical models of "triangle" water-inrush mode. The geological backg...The water-inrush mechanism of strong water-guide collapse column in coal seam is studied based on the establishment of geological and mathematical models of "triangle" water-inrush mode. The geological background of Shuangliu mine is considered a prototype, similar simulation tests are adopted to analyze the water-inrush rules under this model, and the formation of water-guide channel and water-inrush process is investigated by examining the changes in rock resistivity. This work also uses the coupled cloud image derived from numerical simulation software to verify the results of simulation test. Results show that the numerical simulation of "triangle" water-inrush mode is consistent with the similar simulation. The "triangle" seepage area, which is located at the bottom of collapse columns and is connected to aquifer, is caused by the altered seepage direction and strengthened seepage actions after the overlapping of hydraulic transverse seepage in collapse column and hydraulic vertical seepage flow in aquifer. Under "triangle"water-inrush model, water-guide channel is formed by the communication between plastic failure zone of working face baseplate and"triangular" seepage area. Accordingly, the threatening water-inrush distance between working face and collapse column increases by 20 m compared with that of theoretical calculation.展开更多
The subjection function of the fuzzy quantity is bell like,which is on the base of the theory;but during the course of the control,each fuzzy grade should be predigested into a triangle of W=4.
目的探讨不同地域和性别受试者的普通话元音空间面积的差异。方法各选取62例常住北京(男32例,女30例)和上海(男32例,女30例)的健康大学生为研究对象,分别以六个中文元音/a/、/i/、/e/、/u/、/o/、/ü/和短文《假期》为语料,测试其...目的探讨不同地域和性别受试者的普通话元音空间面积的差异。方法各选取62例常住北京(男32例,女30例)和上海(男32例,女30例)的健康大学生为研究对象,分别以六个中文元音/a/、/i/、/e/、/u/、/o/、/ü/和短文《假期》为语料,测试其普通话元音空间面积(vowel space area,VSA)。结果不同性别的VSA差异极其显著(P<0.001),女性的VSA明显大于男性。语料和地区的简单效应检验显示,当语料为连续语音时,北京和上海的受试者的VSA显示没有显著差异;但当语料为单元音时,上海受试者的VSA显著大于北京受试者(P=0.003,P<0.01)。结论普通话体系下,成年女性的VSA比男性大,女性的前元音更趋前,后元音更趋后。不同地域受试者VSA的差异并不显著。展开更多
基金Projects(51374093,51104058)supported by the National Natural Science Foundation of ChinaProject(2013CB227903)supported by the National Basic Research Program of China
文摘The water-inrush mechanism of strong water-guide collapse column in coal seam is studied based on the establishment of geological and mathematical models of "triangle" water-inrush mode. The geological background of Shuangliu mine is considered a prototype, similar simulation tests are adopted to analyze the water-inrush rules under this model, and the formation of water-guide channel and water-inrush process is investigated by examining the changes in rock resistivity. This work also uses the coupled cloud image derived from numerical simulation software to verify the results of simulation test. Results show that the numerical simulation of "triangle" water-inrush mode is consistent with the similar simulation. The "triangle" seepage area, which is located at the bottom of collapse columns and is connected to aquifer, is caused by the altered seepage direction and strengthened seepage actions after the overlapping of hydraulic transverse seepage in collapse column and hydraulic vertical seepage flow in aquifer. Under "triangle"water-inrush model, water-guide channel is formed by the communication between plastic failure zone of working face baseplate and"triangular" seepage area. Accordingly, the threatening water-inrush distance between working face and collapse column increases by 20 m compared with that of theoretical calculation.
文摘The subjection function of the fuzzy quantity is bell like,which is on the base of the theory;but during the course of the control,each fuzzy grade should be predigested into a triangle of W=4.
文摘目的探讨不同地域和性别受试者的普通话元音空间面积的差异。方法各选取62例常住北京(男32例,女30例)和上海(男32例,女30例)的健康大学生为研究对象,分别以六个中文元音/a/、/i/、/e/、/u/、/o/、/ü/和短文《假期》为语料,测试其普通话元音空间面积(vowel space area,VSA)。结果不同性别的VSA差异极其显著(P<0.001),女性的VSA明显大于男性。语料和地区的简单效应检验显示,当语料为连续语音时,北京和上海的受试者的VSA显示没有显著差异;但当语料为单元音时,上海受试者的VSA显著大于北京受试者(P=0.003,P<0.01)。结论普通话体系下,成年女性的VSA比男性大,女性的前元音更趋前,后元音更趋后。不同地域受试者VSA的差异并不显著。
