264results about How to "Improve the support effect" patented technology

The invention provides a compression-resistant carton for logistics transportation, and relates to the technical field of compression-resistant cartons. A leakage-proof assembly is arranged in the packaging assembly. An inner protection assembly is arranged in the packaging assembly. A cross supporting assembly is arranged in the inner protection assembly; the two sets of overturning plates are rotationally connected into the outer packing box, and the interlocking inserting plates are mutually pressed when intersecting, so that dispersion caused by the weight of cargoes is avoided, the cargoes are conveniently prevented from leaking out of the bottom in a mutual pressing mode, and the problem that for an existing traditional pressure-resistant carton, the weight of the cargoes is too large is solved. The problem that when cartons and goods are transported, if the cartons are heavy, the adhesive tape cannot support the weight of the cartons and the goods, and the cartons are prone to leaking out of the bottom and being damaged is solved through the technical scheme that the cartons and the goods are usually subjected to adhesion forming treatment through the adhesive tape after being treated through indentation equipment.

The invention relates to a gob-side entry retaining grouting reinforcement technology in the field of mining engineering, provides a method for grouting reinforcement of a reuse roof of a gob-side entry retaining of a coal mine and accurate control of the grouting amount, and aims to realize real-time monitoring and control of the grouting amount in the grouting process. According to the method, pressure monitoring, flow velocity monitoring, low-frequency electromagnetic wave detection, ultrasonic detection and on-site drilling slurry discharge monitoring are combined, the grouting process is detected in real time through multiple monitoring means, and it is ensured that cement slurry fills cracks and does not flow into a goaf. And meanwhile, cement paste with different particle sizes is adopted for grouting step by step according to the size of the crack, and paste leakage is avoided while the filling effect is guaranteed. The method is suitable for grouting operation under complex geological conditions, has the characteristics of high efficiency and accuracy, and remarkably improves the stability and safety in the use process of a roadway.

The invention belongs to the technical field of tunnel supporting, and particularly relates to a yielding type constant-resistance energy absorption steel arch. The steel arch is formed by assembling a plurality of profile steel units and a plurality of constant-resistance yielding devices, and the constant-resistance yielding devices are arranged among the profile steel units; the constant-resistance yielding device comprises an outer supporting frame and an inner supporting frame, one end of the inner supporting frame extends into the outer supporting frame, the inner supporting frame moves in a guiding mode along the outer supporting frame, and constant-resistance friction structures are arranged on the mutual contact faces of the outer supporting frame and the inner supporting frame. A constant-resistance sleeve is arranged on one of the outer supporting frame and the inner supporting frame, an anchor cable is arranged on the other one of the outer supporting frame and the inner supporting frame, one end of the anchor cable penetrates into the constant-resistance sleeve, a constant-resistance sliding body is arranged on the portion, penetrating into the constant-resistance sleeve, of the anchor cable, and the constant-resistance sliding body slides in the constant-resistance sleeve in a guiding mode with constant resistance. The constant-resistance yielding device can play a dual constant-resistance yielding role, so that the steel arch can play a good supporting role on the basis of adapting to surrounding rock deformation, and the safety of a supporting system is improved.

The invention discloses a foundation pit supporting structure, and relates to the technical field of foundation pit supporting, and the foundation pit supporting structure comprises a supporting plate, a plurality of water absorption pieces and a plurality of positioning rods; a plurality of mounting grooves are formed in one side of the support plate, and the plurality of water absorption pieces are respectively arranged in the plurality of mounting grooves; a plurality of penetrating holes are formed in the supporting plate in a penetrating mode, a sharp thorn is arranged at one end of the positioning rod, and after the sharp thorn penetrates into soil at the bottom of a foundation pit, the part, located in the penetrating holes, of the positioning rod blocks openings in the bottoms of the penetrating holes; a plurality of water passing spaces, a plurality of first water seepage holes and a plurality of second water seepage holes are further formed in the supporting plate; the water passing space is communicated with the mounting groove through the plurality of first water seepage holes, and the water passing space is communicated with the through hole through the plurality of second water seepage holes. The supporting effect can be effectively achieved on the surrounding foundation pit with the high soil humidity, and meanwhile the probability of water permeation can be effectively reduced.

The invention relates to the technical field of tunnel construction, in particular to a construction method for a double-track tunnel to pass through basalt with tuff in a water-rich section. Comprising the following steps: S1, tuff identification; s2, advanced geological forecast; s3, closing the tunnel face; s4, a forepoling system is established; S5, a tunnel body is excavated, wherein a three-step method is adopted as an excavation construction method; s6, reinforcing a steel frame lock leg support; s7, support parameters are determined; s8, arranging drainage holes; and S9, monitoring and measuring. A plurality of supporting systems are formed, the supporting effect is good, combination with the soil body is stable, the water plugging consolidation effect is obvious, and construction is safe and reliable; the supporting method and the grouting means are organically combined, the procedure connection continuity is good, safety is high, the application range is wide, the construction speed is high, and safety performance is high. The construction method is mainly applied to the construction aspect of the double-track tunnel crossing the basalt and tuff in the water-rich section.

The invention belongs to the technical field of construction of end walls of ultra-large-span loess tunnels, and particularly relates to a dovetail section tunnel face plugging structure and a construction method. Comprising a blocking structure outside the excavation range of two small holes in a large tunnel hole and a supporting structure in the excavation range of the small holes. The blocking structure sequentially comprises a drainage system, a steel supporting structure, a reinforcing anchor rod, a first reinforcing mesh and a first sprayed concrete layer from inside to outside in the tunneling direction of the tunnel. The supporting structure comprises a second sprayed concrete layer, anchor rods and a second reinforcing mesh; the forked tail section tunnel face plugging structure is easy to construct, the plugging structure in a large tunnel hole is easy and convenient to install, all structural layers are high in connectivity and good in integrity, and the supporting effect is remarkable; the drainage system is convenient to install and can meet the drainage requirement under the water-rich stratum; the reinforcing anchor rod can be suitable for unfavorable geology reinforcement construction; the construction method of the forked tail section tunnel face blocking structure is convenient and fast in construction, the blocking structure is safe and reliable, and a hole is easy and convenient to break.

The invention relates to the technical field of foundation pit supporting, and discloses an assembly type foundation pit supporting device which comprises a plurality of supporting mechanisms, every two adjacent supporting mechanisms are assembled and connected through an assembly frame, each supporting mechanism comprises a base, and a U-shaped supporting frame is fixedly connected to the top of each base. And a plurality of fastening rods are fixedly connected to the bottom of the base. According to the assembly type foundation pit supporting device, the slope protection plates are installed in the U-shaped frame in a rotating mode, supporting work of different slope surfaces can be met, supporting work of the vertical inner side face of a foundation pit is also included, the diversity of foundation pit supporting is improved, the anchoring frame is installed on the upper surface of the foundation pit, and the foundation pit supporting efficiency is improved. The unfolded end of the slope protection plate can be reinforced through the steel rope, the slope surface reinforcing stability of the slope protection plate is improved, and the problems that in the prior art, reinforcing is conducted in an inclined strut mode, the reinforcing strength is not high, and rollover is prone to occurring are solved.

The invention discloses an assembly adjustable tunnel excavation supporting protection mechanism, relates to the technical field of tunnel supporting structures, and solves the problems that a supporting plate for protecting a tunnel needs to bear very large downward pressure, the supporting plate is easily damaged and even fractured during protection, and the protection capability is affected. The assembled adjustable tunnel excavation supporting mechanism comprises a tunnel body, a supporting bottom plate, a vertical lifting mechanism and an adjustable excavation supporting mechanism, and the supporting bottom plate is installed at the inner bottom of the tunnel body. According to the supporting structure, it is guaranteed that the side supporting plates and the supporting plates assembled on the side faces of the side supporting plates can tightly abut against the inner wall of the tunnel, gaps and other problems cannot be generated, the supporting contact area of the tunnel is increased, and meanwhile the supporting bearing capacity of the inner wall of the tunnel can be guaranteed. And meanwhile, the side supporting plates, the sliding rods arranged at the bottoms of the side supporting plates, the external columns and the upper supporting plate can form triangles, it is guaranteed that the problems of breakage and the like cannot occur when the tunnel is supported, and safety is higher.

The invention discloses an auxiliary supporting structure for constructional engineering, and belongs to the field of auxiliary supporting structures.The auxiliary supporting structure comprises a foundation pit, a plurality of auxiliary supporting mechanisms are arranged in the foundation pit, and the auxiliary supporting mechanisms composed of first adjusting mechanisms, second adjusting mechanisms and auxiliary supporting plates are used in cooperation with the foundation pit; the distance between the auxiliary supporting plates on the two sides is adjusted through the first adjusting mechanism, the auxiliary supporting mechanisms can play an auxiliary supporting role on the foundation pit according to the widths of different foundation pits, and the auxiliary supporting plates can be tightly attached to the two side walls in the foundation pit by adjusting the inclination angles of the auxiliary supporting plates in cooperation with the second adjusting mechanism. The auxiliary supporting mechanism is arranged on the side wall of the foundation pit to adapt to supporting of the foundation pit with the inclined side wall, it is ensured that no gap is generated between the side wall and the foundation pit when the foundation pit is supported, the side wall can be completely supported, collapse caused by water and soil loss of the foundation pit is avoided, and therefore the supporting effect on the foundation pit is improved, and the applicability of the auxiliary supporting mechanism is improved.

The utility model provides a deep foundation pit supporting structure, which relates to the technical field of foundation pit supporting and comprises an external Larsen steel sheet pile and a steel enclosing purlin positioned on the inner side of the Larsen steel sheet pile, and the inner side of the steel enclosing purlin is connected with a steel supporting piece through a steel cushion box; a plurality of layers of steel enclosing purlins are horizontally arranged, each layer of steel enclosing purlins is connected with a layer of steel supporting pieces, four sets of steel supporting pieces are arranged on each layer of steel enclosing purlins, and a set of steel supporting pieces is connected between the steel enclosing purlins on the inner sides of every two adjacent Larsen steel sheet piles. Each set of steel supporting pieces comprises at least two steel supporting pieces, each set of steel supporting pieces comprises a long support and a plurality of short supports, and the long supports and the short supports of each set of steel supporting pieces are arranged in parallel. The utility model has the beneficial effects of reasonable design, simple structure, safety and reliability, and can provide reliable support for different soil layers, improve the supporting effect and reduce the construction difficulty and cost.

The invention relates to the field of roadway engineering, in particular to a surrounding rock control method for a large-section soft rock roadway, which comprises the following steps of: acquiring actual geological conditions of a mine to obtain geological data; establishing a numerical model by the numerical simulation software, substituting the geological data into the numerical model, and performing excavation simulation to obtain a mine pressure appearing rule; and determining a supporting scheme according to the mine pressure display rule.

The invention discloses an under-mine double-telescopic onboard temporary support, and belongs to the technical field of under-mine temporary support devices. The overturning device comprises an overturning arm which is rotatably mounted on the heading machine, a connecting seat is movably arranged on the overturning arm; a main top frame, a first-stage top frame and a second-stage top frame which are mutually nested through hydraulic supporting rods are arranged on the connecting seat; the folding type temporary support effectively solves the problems that an existing folding type temporary support is large in overall structure and not ideal in support effect.

The invention discloses step-by-step heightening and jacking equipment for lifting a large device, which is characterized in that a lifting system base (2) is provided with a heightening block lifting oil cylinder (3), a heightening block locking device of a heightening block jacking platform (4) corresponds to a locking groove in position, a material preparation system is positioned on the outer side of a lifting system, heightening blocks (12) are stacked in a heightening block material preparation area (13), and the heightening block lifting oil cylinder (3) is connected with the heightening block jacking platform (4); the left side material preparation lifting device and the right side material preparation lifting device can separate the upper block-up block (12) from the bottom block-up block (12), and the bottom block-up block (12) is conveyed into the block-up block containing area (9) through the automatic feeding platform. The control method can control the lifting platform (4) to move to the position corresponding to a locking groove in the side face of the block-up block through the block-up block lifting oil cylinder (3); the block-up block (12) is arranged in the block-up block jacking platform (4) and locked in the block-up block jacking platform (4), the block-up block lifting oil cylinder (3) drives the block-up block jacking platform (4) to move so that the block-up block (12) can move, manpower and material resources can be saved, and the block-up efficiency can be greatly improved.

A self-adaptive pressure-bearing energy-absorbing upward drift filling method based on intelligent monitoring and early warning comprises the steps that rock masses are classified according to the crushing degree of the rock masses, and grouting parameters are selected; a plurality of advanced spindle type grouting guide pipes are driven into one section of the periphery of the hanging wall loose rock mass; high-pressure grouting operation is conducted, and a grout anchoring area with the thickness being 1 m is formed; after smooth blasting operation, single-time lagging supporting is carried out, and multiple times of lagging supporting are sequentially carried out on the rear portion at the interval of 0.6 m along with the excavation progress; when the top is pressed, the wear-resistant gasket is used for achieving first-stage energy absorption, the energy absorption material is used for achieving second-stage energy absorption, deformation pressure sensing is conducted through the intelligent sensor, and early warning reminding is conducted through the monitoring terminal; dismounting and recovering the top protection type U-shaped steel and the wall protection type U-shaped steel; and filling and supporting the mined straight wall arch roadway by using the tail mortar. The method has high pertinence for stoping of the hanging wall surrounding rock broken thin vein and has the advantages that supporting is asymmetric, materials can be recycled, intelligent monitoring is achieved, and the supporting strength is self-adaptive.

The invention provides a low-cost admixture for shotcrete and a preparation method thereof. The raw materials for preparing the admixture include the following components by weight percentage: 40% to 50% silica fume, 5% to 10% fast-hardening sulphoaluminate cement, 35% to 45% reinforcing agent, 2% to 4% dispersant, 1% to 2% shrinkage reducing agent, and 0.5% to 1% regulator. The raw materials for the shotcrete admixture are widely available, cheap and easy to obtain, can significantly improve the cohesiveness and pumpability of the shotcrete, shorten the setting time of the shotcrete, have high bonding strength with the rock base, reduce the rebound rate of the shotcrete, and greatly save the project construction cost.

The invention discloses a buckle assembly type recoverable anchor rod, and relates to the technical field of anchoring supporting, the buckle assembly type recoverable anchor rod comprises a first anchor rod and a second anchor rod installed on the top of the first anchor rod, the outer side of the upper portion of the second anchor rod is sleeved with an anchoring plate, the top of the anchoring plate is connected with a fixing nut, and the fixing nut is in threaded connection with the second anchor rod; a sealing plug is installed at the top end of the second anchor rod, the outer pipe body is connected to the outer side of the first anchor rod and the outer side of the second anchor rod in a sleeving mode, a top plate is connected to the top of the outer pipe body, and a threaded sleeve is fixedly connected to the bottom of the outer pipe body; the splicing assembly is arranged at the bottom of the second anchor rod, and the splicing assembly comprises a splicing part; and an adaptive structure is arranged at the top of the anchor rod I. The problems that the top end of the anchor rod cannot be well and directly attached to the deepest position of a drilled hole when the anchor rod is used for drilling holes with different hole opening depths, the supporting effect of the anchor rod is reduced, and when the anchor rod is locally damaged, the whole anchor rod needs to be replaced, and resource waste is caused are solved.

The utility model discloses a coal mine composite supporting structure which comprises a U-shaped shed, the U-shaped shed is fixed on the inner side wall of a roadway, an iron back plate is fixed on the periphery of the U-shaped shed in the extending direction of the roadway, an anchor net is laid on the lower edge of the U-shaped shed, the coal mine composite supporting structure further comprises a hollow grouting anchor cable fixed on the side wall of the roadway, and a guniting layer is filled between the anchor net and the side wall of the roadway. The supporting effect is improved, the roadway maintenance amount is reduced, the service period is prolonged, and the cost is saved.

The utility model discloses an energy-absorbing pressure-resistant top beam of a top coal caving hydraulic support. The energy-absorbing pressure-resistant top beam comprises a top beam main body, a lifting plate and a pressure-resistant unloading assembly, the top beam main body has corresponding supporting force and is used for supporting a top plate; sinking grooves are formed in the supporting working face and used for containing corresponding parts; the lifting plate is erected above the sinking groove through the pressure-resistant unloading assembly, and an extrusion strip is arranged at the top end of the lifting plate to carry out corresponding support extrusion operation; the compression-resistant force unloading assembly comprises a deformation energy absorption part which is arranged in the sinking groove and located below the lifting plate, a supporting plate is assembled at the top end of the deformation energy absorption part and has corresponding supporting force, and the lifting plate is erected above the supporting plate through a lifting supporting column; the movable supporting blocks are fixedly connected and supported at the two ends of the bottom of the deformation energy-absorbing piece, balls are arranged at the bottom of the movable supporting blocks, and when the deformation energy-absorbing piece is stressed and deforms, the movable supporting blocks move in the frame moving direction in the sinking groove; the supporting springs are arranged between the movable supporting blocks and the corresponding inner walls of the sinking grooves in the frame moving direction, self-adaptive deformation is carried out when the movable supporting blocks move, a top coal seam top plate is stably supported, large and hard coal briquettes can be crushed through extrusion, and the situation that the large coal briquettes fall off to crush the top beam is prevented.

The utility model relates to the technical field of foundation pit supporting, and provides a foundation pit supporting device which comprises a supporting plate, a first hole groove and a second hole groove are formed in the supporting plate, the first hole groove and the second hole groove are matched with a supporting rod and a fixing device respectively, the supporting rod is installed in the first hole groove in a sliding mode, and the fixing device is installed in the second hole groove in a sliding mode. The fixing device is provided with an inserting groove, and the second tip end of the supporting rod is inserted into the inserting groove. The supporting rod, the fixing device and the supporting plate are in a stable triangular supporting state, the supporting bearing capacity is larger, installation is convenient, the supporting plate can be easily inserted into soil through the first tip end so that the supporting plate can be fixed, the second tip end is inserted into the inserting groove, the inserting groove can well lock the supporting rod, and the supporting rod is not prone to falling off. Displacement of the supporting rods and the fixing devices is limited through the fixing device clamping seats and the supporting rod clamping seats, installation of the supporting rods and the fixing devices is facilitated, displacement of the supporting rods and the fixing devices due to stress is avoided, sliding grooves are formed in the clamping plates, and adjacent supporting plates can be fixed together conveniently.

A broaching blade is rotationally arranged in a containing groove, the back and the cutting edge of the broaching blade are both arranged in the containing groove, when the tool rotates forwards, the diameter of the maximum contour formed by rotation of a drill bit is larger than that of the maximum contour formed by rotation of a tool apron, and the tool rotates backwards so that the broaching blade can be centrifugally thrown out; and the contour diameter formed by rotation of the cutting edges of the thrown-out reaming blades is larger than the maximum contour diameter formed by rotation of the drill bit. One-time forming drilling and reaming can be achieved, the drill rod and the drill bit do not need to be taken back to reinstall the reaming drill bit after drilling is finished, and the workload and the construction time are effectively reduced; according to the invention, reaming at different drilling depths can be realized, the effect of multi-section reaming can also be realized, and high adaptability to different reaming positions is realized; compared with common anchoring, the chambering anchoring can effectively improve the anti-drawing capacity of anchoring of the anchor rod and the anchor cable, and the supporting effect of an anchoring system can be effectively improved under the condition of the same anchoring number.

A bonding anchor type pre-anchored pressure-yielding hollow anchor and anchoring method, which still has a good supporting effect under the condition of large deformation of the surrounding rock to ensure the stability of the tunnel, meet the problem of large deformation of the tunnel surrounding rock, and realize the rapid installation of the anchor, solve the technical problem of mixing and anchoring of the bonding anchor type pre-anchored hollow anchor. A constant resistance pressure-yielding mechanism is arranged at the rear of the hollow anchor rod body, and the constant resistance pressure-yielding mechanism includes an outer sleeve, a pressure-yielding cylinder and a pressure-yielding nut. The pressure-yielding cylinder is sleeved in the outer sleeve, and its distal and proximal ends have guide sections that slide with the annular inner wall of the outer sleeve, and the deformation section formed by radial inward contraction is between the distal and proximal guide sections. The distal end of the outer sleeve is a limit ring formed by radial inward contraction, and the rear of the hollow anchor rod body passes through the limit ring and the inner cavity of the pressure-yielding cylinder, and the pressure-yielding nut is threadedly connected with the hollow anchor rod body and acts on the inner wall of the transition section between the proximal guide section and the deformation section, and the end face of the distal guide section acts on the limit ring. The backing plate is sleeved on the outer sleeve, the nut is threadedly connected with the external thread section at the rear of the outer sleeve, and the front end surface of the nut acts on the backing plate surface.

The utility model discloses an unloading and fixing coupling supporting structure for treating a soft rock roadway floor heave, and relates to the technical field of mine roadway treatment. The bottom plate leveling layer is used for covering, filling and leveling a floor heave; the pouring layer covers the bottom plate leveling layer, and a plurality of pressure relief grooves are formed in the pouring layer; the polyethylene plate layer is laid on the pouring layer; the anchor cable sequentially penetrates through the polyethylene plate layer, the pouring layer and the bottom plate leveling layer and then is obliquely inserted into the bottom of the surrounding rock of the soft rock roadway. The supporting device is suitable for the soft rock roadway, can effectively reduce the influence of large deformation caused by bottom heaving of a crossheading of the soft rock roadway, guarantees the safety and stability of a mine roadway, can effectively reduce the influence of severe bottom heaving of an advanced stress concentration area of the soft rock roadway on safety production, is good in supporting control effect, and improves the supporting effect and the working efficiency at the same time.

The utility model relates to a building foundation pit internal and external supporting structure, and belongs to the technical field of building foundation pit construction. A plurality of sets of frame supporting mechanisms for providing supporting force for the first waist beam and the second waist beam are arranged in the length direction of the first waist beam and the second waist beam at intervals, and each frame supporting mechanism comprises a first peripheral pile body and a second peripheral pile body which are located on the outer side of the first steel sheet pile and the outer side of the second steel sheet pile respectively. A top cross beam is connected between the top of the first peripheral pile body and the top of the second peripheral pile body, a vertical stand column A for fixing the first waist beam and a vertical stand column B for fixing the second waist beam are arranged on the top cross beam, and a lower layer supporting rod is arranged between the vertical stand column A and the vertical stand column B. The supporting structure has the advantages that the lower-layer supporting rods, the vertical stand columns A and the vertical stand columns B are combined to support the first steel sheet pile and the second steel sheet pile, and the supporting effect on the first steel sheet pile and the second steel sheet pile can be improved.

The invention relates to the technical field of walls, in particular to a workshop H-shaped steel combined type through window welding wall which comprises a foundation, a plurality of stand columns are evenly installed at the top end of the foundation at equal intervals, cross beams are symmetrically installed on one sides of the stand columns, window seats are installed on the inner sides of the cross beams in an embedded mode, and outer wall plates are symmetrically installed on the outer sides of the cross beams. According to the invention, relative independence is maintained while integrated connection is realized, a sufficient flexible unloading support space is provided while stable rigid support is obtained, good combination of rigid support and elastic support is realized, and the supporting effect is good. Load pressure at the welding position is effectively dispersed and converted, multi-point auxiliary supporting is achieved, the effectiveness, stability and impact resistance of supporting are improved, the load pressure at the welding position is reduced, the situation that the welding seam is damaged due to torque superposition stress is effectively avoided, the stress stability at the connecting position is improved, and the durability of a wall is improved.

The utility model discloses a large-section hydraulic tunnel main adit intersection excavation support door frame in the technical field of tunnel construction, which comprises a reinforcing door frame and a connecting piece, the reinforcing door frame comprises outer door beams and inner door beams, a semicircular door beam is fixedly connected between the top ends of the inner door beams, and a door frame cross beam is fixedly connected between the tops of the outer door beams; the semicircular door beam is connected with the inner side of the portal cross beam, linear reinforcing ribs are fixedly arranged between the outer door beam and the inner door beam, a plurality of sections of inclined reinforcing ribs are fixedly arranged between the semicircular door beam and the portal cross beam, oblique angle supporting pieces are jointly connected between the tops of the inclined reinforcing ribs, and the oblique angle supporting pieces are fixedly connected between the outer door beam and the portal cross beam at the same time; according to the utility model, the outer door beam can be connected and fixed with the main hole support, the inner door beam and the semicircular door beam are in transition connection with the branch hole bracket, and the outer door beam and the inner door beam are connected through the linear reinforcing rib, so that the support at the intersection forms a whole, the stress is dispersed, and a good support effect is provided.

The application discloses a foundation pit supporting structure, relates to the technical field of foundation pit supporting, and comprises a supporting assembly and a reinforcing assembly. The supporting assembly comprises a plurality of base units and a plurality of supporting units. The base units are in abutment with the pit wall on one side of the foundation pit and the pit wall at the bottom. The plurality of supporting units are connected with the plurality of base units, the plurality of supporting units are connected with each other, and the supporting units are in abutment with the pit wall on one side of the foundation pit. The reinforcing assembly comprises a plurality of fixing seats and a plurality of reinforcing pieces. The fixing seats are connected with the foundation on one side of the foundation pit, and the plurality of supporting units are connected with the fixing seats. The reinforcing pieces are located on one side of the supporting assembly, one end of the reinforcing pieces is connected with the fixing seats, and the other end of the reinforcing pieces is connected with the base units. The application can improve the structural strength of the foundation pit supporting structure as a whole and facilitate subsequent construction of construction personnel in the foundation pit.

The utility model provides a coal mine tunneling supporting device which comprises a top plate, a corner attaching unit and three supporting units are arranged below the top plate, the corner attaching unit comprises a left side plate, a right side plate and a rotating shaft, and the left side plate and the right side plate are both arranged on the surface of the rotating shaft in a rotating mode. The left side plate and the right side plate are hinged through the rotating shaft, and the supporting units are arranged at one end of the left side plate, one end of the right side plate and the rotating shaft, so that the angle between the left side plate and the right side plate can be adjusted according to the turning angle of a roadway; according to the supporting device, the three supporting units are arranged, so that the three supporting units support the two ends and the middle of the roadway corner respectively and are reinforced through the top plate, the three supporting units can form a whole, the overall strength can be guaranteed during supporting, the supporting device can adapt to roadway corners of different angles, and the better supporting effect is achieved.

The invention discloses a soft rock large deformation control method and a rapid support system suitable for TBM tunnel construction method characteristics, the method is implemented based on an anchoring support system composed of a short anchoring support system and a long anchoring support system, and the method is suitable for an open TBM construction scene: in a TBM tunneling process, before a shield is exposed, the shield is not exposed, and the long anchoring support system is not exposed; a short anchoring support system of a full-length anchoring anchor rod structure is timely arranged in the radial direction of the 180-degree area of the upper half ring of the tunnel section through a cutter head edge cutter hole, and the short anchoring support system and a shield cooperate to form an initial deformation control system; after the shield is exposed, according to the deformation degree of the surrounding rock, full-length anchoring anchor rods or pre-stressed anchor cables are adopted in a graded mode, long anchoring supporting systems are arranged at intervals with the short anchoring supporting systems in a spiral mode, then the long anchoring supporting systems are cooperatively borne with steel arches, reinforcing meshes and sprayed concrete, and the long anchoring supporting systems are matched with 70m system sprayed concrete and 1000m secondary lining construction behind a tunnel face. According to the method, the displacement around the hole is effectively controlled, the TBM is prevented from being stuck, and the construction safety and efficiency of the open-type TBM in the soft rock large-deformation geology are improved.

The utility model discloses an anchor rod for coal mine reinforcement, and particularly relates to the technical field of anchor rods, the anchor rod comprises a supporting net layer, a transverse supporting piece is arranged at the bottom of the supporting net layer, the transverse supporting piece comprises a top plate, vertical plates are fixed to the bottoms of the two ends of the top plate, a transverse plate is fixed to the bottom of the top plate, and the top plate is connected with a main anchor rod in a penetrating mode. The anchor rod comprises a main anchor rod body and a vertical plate, the vertical plate is connected with an auxiliary anchor rod body in a penetrating mode, the main anchor rod body and the auxiliary anchor rod body each comprise a metal rod body, a pressing plate is arranged at one end of each metal rod body, and the portions, located below the pressing plates, of the metal rod bodies are connected with locking nuts in a threaded mode. Under the simultaneous fixing action of the main anchor rod and the auxiliary anchor rod, the supporting range is expanded, the working intensity of mounting the anchor rods by workers is effectively reduced, the working efficiency of the workers is improved, and the supporting effect is further improved.