46results about How to "Guarantee long-term stability" patented technology

The invention discloses a step type structure filling method for second mining of coal pillars of remnant mining areas. According to the method, on the basis of exploring and ascertaining the remaining coal pillars in the remnant mining areas and pillar mining area distribution situations, step type filling moulds are built and installed; the remaining coal pillars of the remnant mining areas are sequentially side-supported by adoption of a pillar side double-side layered filling method; in addition, a short-wall mechanical second mining working face is arranged; and accordingly, the remaining coal pillars of the remnant mining areas are safely recovered. According to the step type structure filling method for second mining of the coal pillars of the remnant mining areas, the recovery ratio of the coal resources can be increased, the economic benefits can be improved for an enterprise, and dynamic disasters including instantaneous instability, domino instability and the like of pillar type filling bodies in mining fields under the multi-factor coupling effect can also be avoided, so that the long-term stability of the pillar type filling bodies of the mining fields after second mining of the remnant coal is guaranteed.

The invention provides a power consumption control device of intelligent manufacturing robots for automatic storage logistics. The power consumption control device is used for improving power supply reliability and long-term work stability of logistics robots under severe conditions, and comprises a power supply module and a power consumption control module for monitoring the quality of output power of the power supply module. The stability and reliability of power supply circuits of the robots in a long-time continuous working state are strongly guaranteed while switching reliability and long-term stability even under the severe conditions are improved.

The invention provides a reinforced and toughened road rapid repair material and a preparation method thereof. The reinforced and toughened road rapid repair material is prepared from the following raw materials: nonamethylene diamine, urea, polyvinyl alcohol, dipentaerythritol, para-aramid fibers and a defoaming agent. The method comprises the following steps: step 1, optimizing processing characteristics of polyvinyl alcohol; step 2, preparing modified para-aramid fibers; step 3, preparing nonamethylene diamine containing the modified para-aramid fibers; and step 4, preparing composite modified polyurea. The repair material disclosed by the invention can greatly shorten the construction operation time and quickly repair local damage of a pavement; meanwhile, the material has high strength and flexibility, long-term stability of combination of the material and an original pavement can be guaranteed, and secondary damage in the using process is prevented.

The invention discloses a design method and a structure for preventing settlement-deformation damage of a soft-rock subgrade of a road. The design method comprises the steps of (A) testing the uniaxial saturated ultimate compressive strength; (B) judging and sorting by selecting soft rocks; (C) filling the bottom part of an embankment with a layer of sand gravels; (D) filling the subgrade part with the soft-rock fillers in a layering manner, and finally paving a layer of composite geomembrane with two fabrics and one membrane; (E) after filling the soft rocks every time, filling a layer of sand gravels; and (F) reducing the distance of sandwich fillers for the soft rocks easy to humidify and disintegrate and paving a geogrid to carry out reinforcement on embankment slopes. The structure is characterized in that the bottom part of the embankment is filled with one layer of sand gravels, one layer of composite geomembrane with the two fabrics and one membrane is paved on the sand gravel, the subgrade part is filled with the soft rocks in sequence in a layering manner, finally one layer of composite geomembrane with two fabrics and one membrane is paved, the geogrid is adopted at the embankment slopes, and qualified fillers of a roadbed are paved on the top-layer composite geomembrane with two fabrics and one membrane. The design method disclosed by the invention has the advantages that the implementation is easy, the stability is improved, the effect of preventing the settlement-deformation damage of the soft-rock subgrade of the road is obvious and the cost is low.

The invention provides a high-strength durable rapid repair material for roads and a preparation method of the material. The material is prepared from the following raw materials: polyaspartic ester,diisocyanate, ultrahigh-molecular-weight polyethylene, low-molecular-weight polyethylene, heterocyclic aramid fibers, a crosslinking agent, a silane coupling agent and a defoaming agent. The preparation method comprises the following steps: step 1, optimizing processing characteristics of ultrahigh-molecular-weight polyethylene; step 2, preparing active polyethylene composite powder; step 3, preparing polyaspartic ester-polyethylene composite powder; step 4, preparing modified heterocyclic aramid fibers; and step 5, preparing composite modified polyurea. The repairing material provided by theinvention can greatly shorten the construction operation time and quickly repair local damages of a road surface; and meanwhile, the material has higher strength and flexibility, can ensure long-termstability of combination of the material with an original road surface, and can prevent secondary damage in a using process.

The invention provides a method for recovering vegetation in a rock-soil residue field, comprising the following steps: 1) removing unstable rocks and sundries on the residue stack and maintaining a certain degree of smoothness; 2) anchoring thread steel arranged in quincunx into the residue stack and pouring anchoring agents for fixation; 3) preparing a compound of vegetable fibers and bentonite; 4) paving the compound obtained in the step 3) on the surface of the residue stack and compacting the compound; 5) spreading and hanging galvanized wire meshes along the grade surface and binding the meshes with tie wires and fixing the meshes on the thread steel; 6) preparing seed matrix mixtures; 7) spraying the seed matrix mixtures; and 8) spreading and hanging non-woven fabrics and watering and managing the fabrics. The method features reasonable cost, simple construction technology, stable structure of the vegetation in the rock-soil residue field during recovery and good water retention, and can effectively recover the vegetation. The method is mainly used for recovering the vegetation in the rock-soil residue field.