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公开(公告)号：US20210189536A1
公开(公告)日：2021-06-24
申请号：US15733046
申请日：2018-05-23
申请人： Manchao HE , Min XIA
发明人： Manchao HE , Min XIA , Hongyan GUO , Jiuping WANG
摘要： An NPR non-magnetic steel material for rock bolt and a production method thereof are disclosed. The NPR non-magnetic steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, Mn: 15-20%, Cr: 1-18%, Si: 0.3-3%, Ca: 0.05-0.15%, Cu: ≤0.03%, Ni: ≤0.02%, S: ≤0.001%, P: ≤0.001%, and the rest being Fe and unavoidable impurity elements. The NPR non-magnetic steel material for rock bolt and the production method thereof effectively solve the problems of steel materials for rock bolt in the prior art such as strong magnetism, low tensile strength and low effective elongation. The NPR non-magnetic steel material for rock bolt has a fully-austenitized structure and is non-magnetic, its yield strength is adjustable in the range of 600-1000 MPa, and its elongation is adjustable in the range of 20-60%.
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公开(公告)号：US20180187548A1
公开(公告)日：2018-07-05
申请号：US15739474
申请日：2016-06-24
申请人： Manchao HE
发明人： Manchao HE , Jun YANG , Shangyuan CHEN , Haijiang ZHANG
摘要： An equipment system for a self-retaining mining method mainly comprises a transition support, an end support, a following support, and a fast-retracting support. Working face gateroads do not need to advance in mining, and a coal mining machine may be used to cut a neat coal wall at the end of a district. The entry rib is automatically formed after roof caving, thus forming a gateroad in a re-mining process. The coal mining machine is under digital control when its end cuts the coal, automatically enabling the end to laterally cut the coal wall to form a vertical straight line, which is used as the entry rib of the gateroad. A scrapper conveyor works in coordination with an arc-shaped coal grabbing plate of the coal mining machine to clean up float coal at the end as much as possible.
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公开(公告)号：US10677055B2
公开(公告)日：2020-06-09
申请号：US15739173
申请日：2016-06-24
申请人： Manchao He
发明人： Manchao He , Zhibiao Guo
摘要： A fractured roof 110 mining method entry-side anti-collapsed structure, one working face of the 110 mining method corresponds to one roadway but without retaining any coal pillar, the roadway retains an entry after the previous working face implements mining top-cutting pressure release, and a roof of the roadway is arch-shape, directional cutting is conducted on one side of the roadway, and the cutting angle is between 15-20 degrees. One working face corresponds to one roadway but without retaining any coal pillar when underground mining is conducted, which can save resources and improve recovery rate of mining. And, the roof of the roadway of the retained entry is arch-shaped, which can improve safety and ensure safety of the coal mining working face. In addition, a cutting angle is 15-20 degrees, which can effectively determine a roof caving direction after top-cutting and reduce affect to the retained entry.
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公开(公告)号：US20180187547A1
公开(公告)日：2018-07-05
申请号：US15739426
申请日：2016-06-24
申请人： Manchao HE
发明人： Manchao HE
CPC分类号： E21C41/18 , E21C41/16 , E21D19/02 , E21D23/0034 , E21D23/0463 , E21F1/00 , E21F1/006
摘要： A longwall N00 mining method includes performing a no-entry excavation and non-pillar mining in N working faces of a new district, and the whole district is provided with an air-return dip, a haulage dip and a track dip, wherein the air-return dip and the track dip are located on one end of the district, and the haulage dip is connected to the other end of the district, and connected to the air-return dip. This method can not only ensure ventilation of the whole coal cutting are, but also when mining is performed in each working face in the district, entries can be automatically formed due to top-cutting pressure release by using a part of a gob area, and thereby it is not required to separately excavate any gateroad entry during mining coal nor need to retain any coal pillar, so as to save resources and improve efficiency.
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公开(公告)号：US20220314291A1
公开(公告)日：2022-10-06
申请号：US17640223
申请日：2020-09-28
申请人： Manchao HE , Min XIA
发明人： Manchao HE , Min XIA , Hongyan GUO , Hongchao LI
摘要： A processing method of NPR steel rebar coil is disclosed. The NPR steel rebar is cold processed and has a diameter of less than 14 mm, and has a yield strength of 800˜950 MPa, a tensile strength of 900˜1100 MPa, and a elongation of not less than 20%. The processing method comprises: a I-shaped placing step L20, an uncoiling step L30, a flattening step L40, a pointing step L50, a butt welding step L60, a hydraulic head-pushing step L70, a cold drawn smoothing step L80, a grit blasting step L90, an in-situ inline annealing step L10, an air-cooled tempering step L11, a coiling step L12, a placing step L13, a flattening step L14, a cold drawn spiral ribbing step L15, a straightening step L16, and a coiling step L17. The method can achieve full intelligence, meet the processing requirements and the automatic intelligent production requirements of NPR steel rebar coil.
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公开(公告)号：US20180202291A1
公开(公告)日：2018-07-19
申请号：US15739173
申请日：2016-06-24
申请人： Manchao HE
发明人： Manchao HE , Zhibiao GUO
摘要： A fractured roof 110 mining method entry-side anti-collapsed structure, one working face of the 110 mining method corresponds to one roadway but without retaining any coal pillar, the roadway retains an entry after the previous working face implements mining top-cutting pressure release, and a roof of the roadway is arch-shape, directional cutting is conducted on one side of the roadway, and the cutting angle is between 15-20 degrees. One working face corresponds to one roadway but without retaining any coal pillar when underground mining is conducted, which can save resources and improve recovery rate of mining. And, the roof of the roadway of the retained entry is arch-shaped, which can improve safety and ensure safety of the coal mining working face. In addition, a cutting angle is 15-20 degrees, which can effectively determine a roof caving direction after top-cutting and reduce affect to the retained entry.
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公开(公告)号：US11596991B2
公开(公告)日：2023-03-07
申请号：US17634181
申请日：2020-09-28
申请人： Manchao He , Min Xia
发明人： Manchao He , Min Xia , Hongyan Guo , Hongchao Li
摘要： A processing method of NPR steel rebar rod is disclosed. The NPR steel rebar is cold processed and has a yield strength of 800˜950 MPa, a tensile strength of 900˜1100 MPa, and a percentage elongation at maximum force of not less than 10˜40%. The processing method comprises the following steps: a I-shaped placing step L20, an uncoiling step L30, a flattening step L40, a butt welding step L50, a sandblasting step L60, a straightening step L70, a pointing step L80, a hydraulic head-pushing step L90, a cold drawn spiral ribbing step L10, a straight forward continuous wire drawing and traction step L11, a pre-straightening step L12, a fine straightening step L13, and a cutting-off step L14. The processing method can meet the automatic intelligent production requirements of NPR steel rebar, cold rolled spiral NPR steel rebar, and pre-stressed NPR steel rebar.
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公开(公告)号：US11434558B2
公开(公告)日：2022-09-06
申请号：US15733046
申请日：2018-05-23
申请人： Manchao He , Min Xia
发明人： Manchao He , Min Xia , Hongyan Guo , Jiuping Wang
摘要： An NPR non-magnetic steel material for rock bolt and a production method thereof are disclosed. The NPR non-magnetic steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, MN: 15-20%, Cr: 1-18%, Si: 0.3-3%, Ca: 0.05-0.15%, Cu: ≤0.03%, Ni: ≤0.02%, S: ≤0.001%, P: ≤0.001%, and the rest being Fe and unavoidable impurity elements. The NPR non-magnetic steel material for rock bolt and the production method thereof effectively solve the problems of steel materials for rock bolt in the prior art such as strong magnetism, low tensile strength and low effective elongation. The NPR non-magnetic steel material for rock bolt has a fully-austenitized structure and is non-magnetic, its yield strength is adjustable in the range of 600-1000 MPa, and its elongation is adjustable in the range of 20-60%.
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公开(公告)号：US20210062311A1
公开(公告)日：2021-03-04
申请号：US15733052
申请日：2018-05-23
申请人： Manchao HE , Min XIA
发明人： Manchao HE , Min XIA , Hongyan GUO , Jiuping WANG
摘要： An NPR steel material for rock bolt and a production method thereof are disclosed. The NPR steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, Mn: 15-20%, Si: ≤0.1%, Cu: ≤0.03%, Cr: ≤0.01%, Ni: ≤0.02%, S: ≤0.001%, P: ≤0.001%, and the rest being Fe and unavoidable impurity elements. The NPR steel material for rock bolt and the production method thereof effectively solve the problem that rock bolts in the prior art have low tensile strength and low effective elongation. The NPR steel material for rock bolt has a yield strength adjustable in the range of 500-1100 MPa, and an elongation adjustable in the range of 10-80%.
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公开(公告)号：US20180195387A1
公开(公告)日：2018-07-12
申请号：US15739338
申请日：2016-06-24
申请人： Manchao HE
发明人： Manchao HE
摘要： A longwall 110 mining method, wherein a haulage dip, an air-return dip and a track dip are provided, a plurality of working faces are arranged in a whole panel, both an upper gateroad and a lower gateroad of each mining face in mining are connected to the haulage dip, and the lower gateroad that retains an entry after the working face is mined is used as an upper gateroad of a next working face, and the lower gateroad of the next working face is connected to the air-return dip. The upper gateroad and the lower gateroad of each working face in mining of the present disclosure are connected to the haulage dip, and the lower gateroad of the working face is connected to the air-return dip.
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