-
公开(公告)号：US12012856B2
公开(公告)日：2024-06-18
申请号：US17786689
申请日：2020-12-18
申请人： SANDVIK MINING AND CONSTRUCTION TOOLS AB , SANDVIK MINING AND CONSTRUCTION AUSTRALIA (PRODUCTION/SUPPLY) PTY LTD
发明人： Osvaldo Vallati
CPC分类号： E21D21/0093 , E21D21/0033 , E21F17/185
摘要： A sensor assembly for a rock bolt, wherein the rock bolt includes a central rod, a split tube and a wedge anchor assembly fitted around the central rod, a rock plate, and a nut for attachment to an outer end of the central rod. The sensor assembly includes a distance sensor, a bracket for attaching the distance sensor to an outer portion of the split tube, an elongate spacing member configured to be fitted around the split tube between the nut and the rock plate to keep the nut and the rock plate spaced apart. The spacing member has an opening extending along at least a portion of the length thereof, the opening being sized large enough to allow movement of the bracket along a portion of the length of the spacing member with the distance sensor attached to the outer portion of the split tube by the bracket.
-
公开(公告)号：US11761335B1
公开(公告)日：2023-09-19
申请号：US18311525
申请日：2023-05-03
申请人： LIAONING UNIVERSITY
发明人： Yishan Pan , Lianpeng Dai , Aiwen Wang , Jun Liu
IPC分类号： E21F17/18
CPC分类号： E21F17/185
摘要： A model selection method for a hydraulic support includes: determining a surrounding rock-support mutual feedback equilibrium curve under a first equivalent in-situ stress and a surrounding rock-support mutual feedback equilibrium curve under a second equivalent in-situ stress, according to the first equivalent in-situ stress, the second equivalent in-situ stress, a stress of a fracture zone on a softening zone under the first equivalent in-situ stress, and a stress of the fracture zone on the softening zone under the second equivalent in-situ stress; determining a support strength of a to-be-selected hydraulic support on the surrounding rock and a minimum expansion and contraction quantity required by a movable column according to the equilibrium curves; determining the residual burst energy that needs to be absorbed by the hydraulic support; and determining the hydraulic support matched with roadway. The method quantitatively achieves parameterized model selection of the bursting-preventing hydraulic support of roadway.
-
公开(公告)号：US09664043B2
公开(公告)日：2017-05-30
申请号：US14897080
申请日：2014-09-02
发明人： Rual Abreu , Cacius Mahlatj
CPC分类号： E21F17/185 , G01V1/00 , G08B3/10 , G08B5/36 , G08B21/182
摘要： The invention provides a rock wall closure detection apparatus which includes an elongate member, variably extensible between a first wall and a second wall Of an underground excavation which comprises of a first and a second segment which are resiliently axially compressible relatively to one another when the waits close and an indicator module which produces a warning signal when actuated, attached to the first segment and an actuator attached to the second segment wherein on compression of the member, the actuator moves relatively to the module to actuate the module to produce the warning signal.
-
公开(公告)号：US20170058672A1
公开(公告)日：2017-03-02
申请号：US15353290
申请日：2016-11-16
发明人： Rual Abreu
CPC分类号： E21F17/185 , G01V1/00 , G08B3/10 , G08B5/36 , G08B21/182
摘要： A hanging wall movement detection apparatus includes a rigid elongate member which extends between a first end and a second end, an indicator module which produces a warning signal when actuated, axially movably engaged with the elongate member, a ground engaging support which rigidly supports the indicator module off the ground, an actuator engaged with the elongate member between the first end and the indicator module, a biasing separator between the actuator and the indicator module. The actuator is drawn towards the indicator module, compressing the biasing separator, when the elongate member experiences a pulling force at the second end in an axial direction away from the indicator module, and the actuator contacts the indicator module to actuate the module to produce a warning signal if the pulling force is of a sufficient magnitude to overcome the bias of the biasing separator.
摘要翻译： 吊壁运动检测装置包括在第一端和第二端之间延伸的刚性细长构件，当被致动时产生警告信号的指示器模块，其与细长构件轴向移动地接合;地面接合支撑件，其刚性地支撑指示器 模块离开地面，与第一端和指示器模块之间的细长构件接合的致动器，在致动器和指示器模块之间的偏置分离器。 当细长构件在远离指示器模块的轴向方向上的第二端处经受拉力时，致动器被朝向指示器模块拉动，压缩偏压分离器，并且致动器接触指示器模块以致动模块以产生 如果拉力足够大以克服偏压分离器的偏压，则警告信号。
-
公开(公告)号：US20160362980A1
公开(公告)日：2016-12-15
申请号：US15182816
申请日：2016-06-15
发明人： Jason Knuth
IPC分类号： E21D15/46 , E21C27/02 , G08B21/02 , E21D23/00 , E21D23/26 , E21D23/14 , E21C25/06 , E21C35/04
CPC分类号： E21D23/26 , E21C35/12 , E21F17/185
摘要： Systems and methods are described for monitoring a condition of a mine roof using a longwall mining system. A plurality of powered roof supports is controlled to apply an adjustable support pressure on a mine roof. A condition of the mine roof is monitored based on the adjustable support pressure applied to the roof by a respective actuator of each powered roof support. In some implementations, the condition of the mine roof is monitored by generating and analyzing a graphical pressure map based on the adjustable support pressure applied by each powered roof support and a relative position of a shearer moving across the mine face. In some implementations, roof collapse events are detected based on temporally similar changes in the adjustable support pressure applied by multiple adjacent powered roof supports as indicated by the graphical pressure map.
摘要翻译： 描述了使用长壁采矿系统监测矿山屋顶状况的系统和方法。 控制多个动力顶棚支撑件以在矿顶上施加可调节的支撑压力。 基于通过每个动力屋顶支撑件的相应致动器施加到屋顶的可调支撑压力来监测矿顶的状况。 在一些实施方式中，通过基于由每个动力屋顶支撑件应用的可调支撑压力和穿过矿井面的采煤机的相对位置生成和分析图形压力图来监测矿顶的状况。 在一些实施方式中，根据图形压力图所示的由多个相邻的动力屋顶支撑件施加的可调支撑压力的时间上相似的变化来检测屋顶塌陷事件。
-
公开(公告)号：US5824912A
公开(公告)日：1998-10-20
申请号：US967220
申请日：1997-10-29
申请人： John C. Stankus , Song Guo
发明人： John C. Stankus , Song Guo
CPC分类号： E21F17/185 , E21C39/00 , E21D20/00 , E21D9/14
摘要： Stresses in an underground mine are determined by analyzing mechanical properties of mine site stratum including Young's modulus. The mechanical properties are combined with the physical layout of the mine. From the application of the mechanical properties, stresses in the mine are determined.
摘要翻译： 通过分析包括杨氏模量在内的矿场地层的力学性能来确定地下矿井的应力。 机械性能与矿山的物理布局相结合。 从应用机械性能来看，确定了矿井中的应力。
-
公开(公告)号：US5511429A
公开(公告)日：1996-04-30
申请号：US277520
申请日：1994-07-19
申请人： Masayuki Kosugi , Akio Tamai
发明人： Masayuki Kosugi , Akio Tamai
IPC分类号： E21B47/00 , E21B47/08 , E21B49/00 , E21F17/18 , G01B5/30 , G01B7/16 , G01B11/16 , H01L27/146 , G01B5/00
CPC分类号： E21F17/185 , E21B47/00 , E21B47/0006 , E21B47/082 , E21B49/006 , G01B11/16 , G01B5/30 , G01B7/16 , H01L27/14643
摘要： A three-dimensional displacement measuring system measures the three-dimensional displacement of a mass such as rock. A first cylindrical member is provided as a displacement indicating device and is arranged on one side of a discontinuous surface, such as a crack, in a bore hole in the rock. The bore hole extends across the discontinuous surface. A second cylindrical member is provided as a displacement measuring device on the other side of the discontinuous surface and is free to displace relative to the mass and the first cylindrical member and is located opposite to the first cylindrical member.
摘要翻译： 三维位移测量系统测量诸如岩石的质量的三维位移。 第一圆柱形构件设置为位移指示装置，并且布置在岩石的钻孔中的诸如裂纹的不连续表面的一侧。 钻孔延伸穿过不连续表面。 第二圆柱形构件设置在不连续表面的另一侧上的位移测量装置，并且相对于质量和第一圆柱形构件自由移位并且与第一圆柱形构件相对。
-
公开(公告)号：US4514905A
公开(公告)日：1985-05-07
申请号：US535428
申请日：1983-09-26
申请人： William W. Lutzens
发明人： William W. Lutzens
CPC分类号： G01B5/30 , E21F17/185
摘要： An extensometer for measuring changes in the vertical distance between the roof and floor of a mine opening which comprises; a pair of rigid telescoping members, a tension spring securing said members to each other in a telescoping relationship, a hook for attaching a non-extensible cable to each of said members, and an indicator for determining telescopic movement of said members. The extensometer of this invention is utilized by securing one of said telescoping members to the roof of the mine and the other telescoping member to the floor of the mine with the axis of said members being disposed along the vertical. The telescoping members are secured, under tension, to the mine roof and floor by means of a non-extendible cable such as a steel cable. The indicator for determining the telescopic movement of the members may be a pair of lugs or flanges or other indicating marks, each member of which pair is affixed to a separate telescoping member.
摘要翻译： 一种用于测量矿井开口的屋顶和地板之间的垂直距离变化的伸长计，包括： 一对刚性伸缩构件，拉伸弹簧，其将所述构件以伸缩关系彼此固定，用于将不可延伸的电缆连接到每个所述构件的钩以及用于确定所述构件的伸缩运动的指示器。 通过将所述伸缩构件中的一个固定到矿井的顶部并且将另一个伸缩构件固定到矿井的地板上，利用所述构件的轴线沿垂直方向设置本发明的引伸计。 伸缩构件通过不可延伸的电缆（例如钢缆）在张紧下固定到矿顶和地板。 用于确定构件的伸缩运动的指示器可以是一对凸耳或凸缘或其他指示标记，其中每个构件对被固定到单独的伸缩构件。
-
公开(公告)号：US4271407A
公开(公告)日：1981-06-02
申请号：US93324
申请日：1979-11-13
CPC分类号： G01B7/24 , E21F17/185 , G01B2210/66
摘要： A ferrite core is suspended from the base of a borehole in a tunnel roof structure and is positioned within coil turns located at the roof surface such that movement of the roof structure causes displacement of the core with respect to the coil turns thus producing a change in inductance. The coil and core are incorporated as a frequency-determining element in an LR oscillator. Therefore, movement of the tunnel roof structure is reflected as a change in the frequency of the oscillator. This frequency is monitored and, if the change exceeds a predetermined threshold, an alarm is given. Several methods of suspending the core in the coil are disclosed, one of which allows for a non-verticle borehole.
摘要翻译： 铁氧体磁芯从隧道屋顶结构中的钻孔的底部悬挂并且位于位于屋顶表面处的线圈内，使得屋顶结构的运动导致芯相对于线圈匝的位移，从而产生变化 电感。 线圈和磁芯作为频率确定元件并入LR振荡器。 因此，隧道屋顶结构的运动反映为振荡器频率的变化。 监视该频率，如果改变超过预定阈值，则给出报警。 公开了将芯悬挂在线圈中的几种方法，其中一种允许非垂直钻孔。
-
公开(公告)号：US4001942A
公开(公告)日：1977-01-11
申请号：US582417
申请日：1975-05-29
CPC分类号： E21F17/185 , G01B5/14 , G01B5/30
摘要： A rod extensometer which can be inserted into a hole drilled into the roof or floor of an underground excavation to monitor the shifting of material surrounding the excavation. The extensometer has a head which is anchored in the inner end portion of the hole by a hardened synthetic plastic substance, an annular section which is inserted into the outer end portion of the hole and is bonded to surrounding material, and a set of interconnected coaxial cylindrical rods one of which is rigid with the head and another of which extends through the annular section. Changes in distance between the outer end of the other rod and the annular section are indicative of movement of material surrounding the inner end portion of the hole relative to material surrounding the outer end portion of the hole and/or vice versa. The head has an externally threaded member which is bonded to the surrounding material and a blade-like or conical breaker member located forwardly of the externally threaded member and serving to break a cartridge which contains separate supplies of a hardenable synthetic plastic bonding substance and a hardening agent for such substance. The annular section of the extensometer has a nut and washer which abuts against the exposed surface of material bounding the outer end portion of the hole, and the outer end of the other rod has flats which can be engaged by a torque transmitting device serving to rotate the rods and the head. Two identical or dissimilar extensometers can be installed in two coaxial holes to facilitate additional measurements, such as changes in the distance between the two heads, changes in the distance between the two nuts, as well as changes in the distance between each head and the respective nut.
摘要翻译： 杆伸长计可以插入到钻进地下开挖屋顶或地板的孔中，以监测围绕挖掘的材料的移动。 引伸计具有通过硬化的合成塑料物质锚固在孔的内端部的头部，插入到孔的外端部并与周围材料接合的环形部分，以及一组互连的同轴 圆柱形杆，其中一个与头部刚性，另一个延伸穿过环形部分。 另一个杆的外端与环形部分之间的距离的变化表示围绕孔的内端部的材料相对于围绕孔的外端部的材料的运动和/或反之亦然。 头部具有外部螺纹构件，其结合到周围材料和位于外螺纹构件前方的刀片状或锥形的断屑器构件，并且用于破坏包含可硬化的合成塑料粘合物质的单独供应的筒和硬化 这种物质的代理。 引伸计的环形部分具有螺母和垫圈，该螺母和垫圈抵靠围绕孔的外端部分的材料的暴露表面，另一个杆的外端具有平面，该平面可以由用于旋转的扭矩传递装置 杆和头。 两个相同的或不同的引伸计可以安装在两个同轴孔中，以便于附加的测量，例如两个头之间的距离的变化，两个螺母之间的距离的变化，以及每个头与相应的距离之间的距离的变化 坚果。
-
-
-
-
-
-
-
-
-
搜索结果
97 条记录 (耗时 0.016 秒)
