-
1.发明公开公开(公告)号：US20240361294A1
公开(公告)日：2024-10-31
申请号：US18571358
申请日：2023-01-09
Inventor： Chenglin TIAN , Qianting HU , Haitao SUN , Xusheng ZHAO
CPC classification number: G01N33/222 , G01N3/00 , G01N2203/0032
Abstract: A method of analyzing influencing factors of a contribution rate of elastic energy of a top plate during catastrophe of a coal body; the specific steps are: obtaining coal seam gas pressure; according to a drilling histogram, obtaining coal seam thickness and top plate thickness; taking a core on site and processing the core into a standard test piece; obtaining, by means of an indoor mechanical test, elastic moduli of the top plate and of gas-containing coal, respectively; substituting the obtained elastic moduli and thicknesses of the top plate and of the gas-containing coal into a calculation formula so as to obtain the contribution rate of the elastic energy of the top plate; and analyzing the influence of the contribution rate of the elastic energy of the top plate in the two situations of configuring the same thickness ratio and a different elastic modulus ratio and the same elastic modulus ratio and a different thickness ratio. In the described method, the role of the elastic energy of the top plate in a coal-gas dynamic disaster is fully considered while the influencing factors of the contribution rate of the elastic energy are analyzed. The method has important theoretical significance and practical engineering value. Moreover, the method has positive significance for the prediction and prevention of mining-induced rock burst-coal and gas outburst and other complex dynamic mining disasters.
-
公开(公告)号：US20240264054A1
公开(公告)日：2024-08-08
申请号：US18571767
申请日：2023-01-09
Inventor： Chenglin TIAN , Qianting HU , Haitao SUN
CPC classification number: G01N3/08 , G01N3/066 , G01N33/24 , G01N2203/0067
Abstract: The present disclosure discloses a method for estimating a contribution rate of elastic energy of a top plate during instability catastrophe of a deep gas-containing coal body, which specifically includes the following steps: acquiring gas pressure of a coal seam; acquiring a thickness of the coal seam and the top plate according to a borehole histogram; coring in the field, processing and pre-processing coal samples, and acquiring an elastic modulus of the top plate, gas-containing coal and standard specimens of a gas-containing coal-rock combination through indoor mechanical tests, respectively; deducing contribution of the elastic energy of the top plate with the help of a graphic area for a stress-strain curve, and obtaining a quantitative expression of the contribution rate of the elastic energy of the top plate based on the elastic modulus and the thickness of the top plate and the gas-containing coal. According to the present disclosure, the function of the elastic energy of the top plate in coal-rock gas dynamic disasters is taken into full account, and a calculation method and a specific quantitative calculation formula are given, so that the function of the elastic energy of the top plate in disasters can be more clearly understood, and beneficial reference is provided for accurate prevention and control of coal-rock gas dynamic disasters in mines.
-
公开(公告)号：US20200217202A1
公开(公告)日：2020-07-09
申请号：US16624984
申请日：2018-07-13
Inventor： Wei LU , Qianting HU , Guansheng QI , Weimin Cheng , Jinliang LI , Dong WANG , Zhen LIU
Abstract: Disclosed is a ground wellhole dedicated protective pipe for gas extraction of a mining-induced area. The ground wellhole dedicated protective pipe for gas extraction of a mining-induced area is disposed inside a ground wellhole for gas extraction of the mining-induced area and the ground wellhole dedicated protective pipe for gas extraction of a mining-induced area includes a casing and a chain that is disposed inside the casing and slidable relative to the casing, wherein the chain includes a plurality of chain drums and connecting pieces movably connecting the adjacent chain drums, and a plurality of air holes are opened in the chain drum along an axial direction of the chain drum. Beneficial effects include as follows: the ground wellhole dedicated protective pipe for gas extraction of a mining-induced area is capable of resisting a change and a failure of the casing caused by a shearing force, a squeezing force and a stretching force due to a displacement of a rock stratum simultaneously, and ensures the gas passes under any one or more forces no matter what displacement and forces occur to a protection region inside the ground wellhole for gas extraction of the mining-induced area, and thus the pipe has versatility, economy and applicability compared with traditional protection methods and apparatuses.
-
-
Search Results
3
records
(took 0.026 seconds)
